Vocabulary

Ability model: An approach that views EI as a standard intelligence that utilizes a distinct set of mental abilities that (1) are intercorrelated, (2) relate to other extant intelligences, and (3) develop with age and experience (Mayer & Salovey, 1997).
Ablation: Surgical removal of brain tissue.
Absolute threshold: The smallest amount of stimulation needed for detection by a sense.
Acceptance and commitment therapy: A therapeutic approach designed to foster nonjudgmental observation of one’s own mental processes.
Action potential: A transient all-or-nothing electrical current that is conducted down the axon when the membrane potential reaches the threshold of excitation.
Adaptation: The fact that after people first react to good or bad events, sometimes in a strong way, their feelings and reactions tend to dampen down over time and they return toward their original level of subjective well-being.
Adherence: In health, it is the ability of a patient to maintain a health behavior prescribed by a physician. This might include taking medication as prescribed, exercising more, or eating less high-fat food.
Adoption study: A behavior genetic research method that involves comparison of adopted children to their adoptive and biological parents.
Affect: Feelings that can be described in terms of two dimensions, the dimensions of arousal and valence (Figure 2). For example, high arousal positive states refer to excitement, elation, and enthusiasm. Low arousal positive states refer to calm, peacefulness, and relaxation. Whereas “actual affect” refers to the states that people actually feel, “ideal affect” refers to the states that people ideally want to feel.
Affective forecasting: Predicting how one will feel in the future after some event or decision.
Afferent nerves: Nerves that carry messages to the brain or spinal cord.
Agnosia: Loss of the ability to perceive stimuli.
Agnosias: Due to damage of Wernicke’s area. An inability to recognize objects, words, or faces.
Agonists: A drug that increases or enhances a neurotransmitter’s effect.
Agoraphobia: A sort of anxiety disorder distinguished by feelings that a place is uncomfortable or may be unsafe because it is significantly open or crowded.
Agreeableness: A core personality trait that includes such dispositional characteristics as being sympathetic, generous, forgiving, and helpful, and behavioral tendencies toward harmonious social relations and likeability.
Agreeableness: A personality trait that reflects a person’s tendency to be compassionate, cooperative, warm, and caring to others. People low in agreeableness tend to be rude, hostile, and to pursue their own interests over those of others.
Alogia: A reduction in the amount of speech and/or increased pausing before the initiation of speech.
Altruism: A desire to improve the welfare of another person, at a potential cost to the self and without any expectation of reward.
Altruism: A motivation for helping that has the improvement of another’s welfare as its ultimate goal, with no expectation of any benefits for the helper.
Ambulatory assessment: An overarching term to describe methodologies that assess the behavior, physiology, experience, and environments of humans in naturalistic settings.
Anecdotal evidence: A piece of biased evidence, usually drawn from personal experience, used to support a conclusion that may or may not be correct.
Anhedonia: Loss of interest or pleasure in activities one previously found enjoyable or rewarding.
Anhedonia/amotivation: A reduction in the drive or ability to take the steps or engage in actions necessary to obtain the potentially positive outcome.
Animism: The belief that everyone and everything had a “soul” and that mental illness was due to animistic causes, for example, evil spirits controlling an individual and his/her behavior.
Anosmia: Loss of the ability to smell.
Antagonist: A drug that blocks a neurotransmitter’s effect.
Anterograde amnesia: Inability to form new memories for facts and events after the onset of amnesia.
Antisocial: A pervasive pattern of disregard and violation of the rights of others. These behaviors may be aggressive or destructive and may involve breaking laws or rules, deceit or theft.
Anxiety: A mood state characterized by negative affect, muscle tension, and physical arousal in which a person apprehensively anticipates future danger or misfortune.
Aphasia: Due to damage of the Broca’s area. An inability to produce or understand words.
Arcuate fasciculus: A fiber tract that connects Wernicke’s and Broca’s speech areas.
Arousal: cost–reward model: An egoistic theory proposed by Piliavin et al. (1981) that claims that seeing a person in need leads to the arousal of unpleasant feelings, and observers are motivated to eliminate that aversive state, often by helping the victim. A cost–reward analysis may lead observers to react in ways other than offering direct assistance, including indirect help, reinterpretation of the situation, or fleeing the scene.
Asylum: A place of refuge or safety established to confine and care for the mentally ill; forerunners of the mental hospital or psychiatric facility.
Attachment behavioral system: A motivational system selected over the course of evolution to maintain proximity between a young child and his or her primary attachment figure.
Attachment behaviors: Behaviors and signals that attract the attention of a primary attachment figure and function to prevent separation from that individual or to reestablish proximity to that individual (e.g., crying, clinging).
Attachment figure: Someone who functions as the primary safe haven and secure base for an individual. In childhood, an individual’s attachment figure is often a parent. In adulthood, an individual’s attachment figure is often a romantic partner.
Attachment patterns: (also called “attachment styles” or “attachment orientations”) Individual differences in how securely (vs. insecurely) people think, feel, and behave in attachment relationships.
Attitude: A way of thinking or feeling about a target that is often reflected in a person’s behavior. Examples of attitude targets are individuals, concepts, and groups.
Attitude: A psychological tendency that is expressed by evaluating a particular entity with some degree of favor or disfavor.
Attraction: The psychological process of being sexually interested in another person. This can include, for example, physical attraction, first impressions, and dating rituals.
Attributional style: The tendency by which a person infers the cause or meaning of behaviors or events.
Audience design: Constructing utterances to suit the audience’s knowledge.
Audition: Ability to process auditory stimuli. Also called hearing.
Auditory canal: Tube running from the outer ear to the middle ear.
Auditory hair cells: Receptors in the cochlea that transduce sound into electrical potentials.
Autobiographical memory: Memory for the events of one’s life.
Automatic: A behavior or process has one or more of the following features: unintentional, uncontrollable, occurring outside of conscious awareness, and cognitively efficient.
Automatic: Automatic biases are unintended, immediate, and irresistible.
Automatic thoughts: Thoughts that occur spontaneously; often used to describe problematic thoughts that maintain mental disorders.
Autonomic nervous system: A part of the peripheral nervous system that connects to glands and smooth muscles. Consists of sympathetic and parasympathetic divisions.
Availability heuristic: A heuristic in which the frequency or likelihood of an event is evaluated based on how easily instances of it come to mind.
Aversive racism: Aversive racism is unexamined racial bias that the person does not intend and would reject, but that avoids inter-racial contact.
Avoidant: A pervasive pattern of social inhibition, feelings of inadequacy, and hypersensitivity to negative evaluation.
Awareness: A conscious experience or the capability of having conscious experiences, which is distinct from self-awareness, the conscious understanding of one’s own existence and individuality.
Axial plane: See “horizontal plane.”
Axon: Part of the neuron that extends off the soma, splitting several times to connect with other neurons; main output of the neuron.
Balancing between goals: Shifting between a focal goal and other goals or temptations by putting less effort into the focal goal—usually with the intention of coming back to the focal goal at a later point in time.
Basal ganglia: Subcortical structures of the cerebral hemispheres involved in voluntary movement.
Behavioral genetics: The empirical science of how genes and environments combine to generate behavior.
Behavioral medicine: A field similar to health psychology that integrates psychological factors (e.g., emotion, behavior, cognition, and social factors) in the treatment of disease. This applied field includes clinical areas of study, such as occupational therapy, hypnosis, rehabilitation or medicine, and preventative medicine.
Behaviorism: The study of behavior.
Big Five: Five, broad general traits that are included in many prominent models of personality. The five traits are neuroticism (those high on this trait are prone to feeling sad, worried, anxious, and dissatisfied with themselves), extraversion (high scorers are friendly, assertive, outgoing, cheerful, and energetic), openness to experience (those high on this trait are tolerant, intellectually curious, imaginative, and artistic), agreeableness (high scorers are polite, considerate, cooperative, honest, and trusting), and conscientiousness (those high on this trait are responsible, cautious, organized, disciplined, and achievement-oriented).
Binocular advantage: Benefits from having two eyes as opposed to a single eye.
Binocular disparity: Difference is images processed by the left and right eyes.
Binocular vision: Our ability to perceive 3D and depth because of the difference between the images on each of our retinas.
Biofeedback: The process by which physiological signals, not normally available to human perception, are transformed into easy-to-understand graphs or numbers. Individuals can then use this information to try to change bodily functioning (e.g., lower blood pressure, reduce muscle tension).
Biological vulnerability: A specific genetic and neurobiological factor that might predispose someone to develop anxiety disorders.
Biomedical Model of Health: A reductionist model that posits that ill health is a result of a deviation from normal function, which is explained by the presence of pathogens, injury, or genetic abnormality.
Biopsychosocial model: A model in which the interaction of biological, psychological, and sociocultural factors is seen as influencing the development of the individual.
Biopsychosocial Model of Health: An approach to studying health and human function that posits the importance of biological, psychological, and social (or environmental) processes.
Blatant biases: Blatant biases are conscious beliefs, feelings, and behavior that people are perfectly willing to admit, are mostly hostile, and openly favor their own group.
Blind to the research hypothesis: When participants in research are not aware of what is being studied.
Blocking: In classical conditioning, the finding that no conditioning occurs to a stimulus if it is combined with a previously conditioned stimulus during conditioning trials. Suggests that information, surprise value, or prediction error is important in conditioning.
Blood Alcohol Content (BAC): Blood Alcohol Content (BAC): a measure of the percentage of alcohol found in a person’s blood. This measure is typically the standard used to determine the extent to which a person is intoxicated, as in the case of being too impaired to drive a vehicle.
Blood-oxygen-level-dependent (BOLD): The signal typically measured in fMRI that results from changes in the ratio of oxygenated hemoglobin to deoxygenated hemoglobin in the blood.
Borderline: A pervasive pattern of instability of interpersonal relationships, self-image, and affects, and marked impulsivity.
“Bottom-up” or external causes of happiness: Situational factors outside the person that influence his or her subjective well-being, such as good and bad events and circumstances such as health and wealth.
Bottom-up processing: Building up to perceptual experience from individual pieces.
Brain stem: The “trunk” of the brain comprised of the medulla, pons, midbrain, and diencephalon.
Broca’s area: An area in the frontal lobe of the left hemisphere. Implicated in language production.
Bystander intervention: The phenomenon whereby people intervene to help others in need even if the other is a complete stranger and the intervention puts the helper at risk.
Callosotomy: Surgical procedure in which the corpus callosum is severed (used to control severe epilepsy).
Cartesian catastrophe: The idea that mental processes taking place outside conscious awareness are impossible.
Case study: A thorough study of a patient (or a few patients) with naturally occurring lesions.
Catatonia: Behaviors that seem to reflect a reduction in responsiveness to the external environment. This can include holding unusual postures for long periods of time, failing to respond to verbal or motor prompts from another person, or excessive and seemingly purposeless motor activity.
Categorize: To sort or arrange different items into classes or categories.
Cathartic method: A therapeutic procedure introduced by Breuer and developed further by Freud in the late 19th century whereby a patient gains insight and emotional relief from recalling and reliving traumatic events.
Causality: In research, the determination that one variable causes—is responsible for—an effect.
Cause-and-effect: Related to whether we say one variable is causing changes in the other variable, versus other variables that may be related to these two variables.
Cell membrane: A bi-lipid layer of molecules that separates the cell from the surrounding extracellular fluid.
Central nervous system: The part of the nervous system that consists of the brain and spinal cord.
Central sulcus: The major fissure that divides the frontal and the parietal lobes.
Cerebellum: A nervous system structure behind and below the cerebrum. Controls motor movement coordination, balance, equilibrium, and muscle tone.
Cerebellum: The distinctive structure at the back of the brain, Latin for “small brain.”
Cerebral cortex: The outermost gray matter of the cerebrum; the distinctive convoluti characteristic of the mammalian brain.
Cerebral hemispheres: The cerebral cortex, underlying white matter, and subcortical structures.
Cerebrum: Consists of left and right hemispheres that sit at the top of the nervous system and engages in a variety of higher-order functions.
Cerebrum: Usually refers to the cerebral cortex and associated white matter, but in some texts includes the subcortical structures.
Chameleon effect: The tendency for individuals to nonconsciously mimic the postures, mannerisms, facial expressions, and other behaviors of one’s interaction partners.
Character strength: A positive trait or quality deemed to be morally good and is valued for itself as well as for promoting individual and collective well-being.
Chemical senses: Our ability to process the environmental stimuli of smell and taste.
Chronic disease: A health condition that persists over time, typically for periods longer than three months (e.g., HIV, asthma, diabetes).
Chronic stress: Discrete or related problematic events and conditions which persist over time and result in prolonged activation of the biological and/or psychological stress response (e.g., unemployment, ongoing health difficulties, marital discord).
Chunk: The process of grouping information together using our knowledge.
Chutes and Ladders: A numerical board game that seems to be useful for building numerical knowledge.
Cingulate gyrus: A medial cortical portion of the nervous tissue that is a part of the limbic system.
Circadian Rhythm: Circadian Rhythm: The physiological sleep-wake cycle. It is influenced by exposure to sunlight as well as daily schedule and activity. Biologically, it includes changes in body temperature, blood pressure and blood sugar.
Classical conditioning: The procedure in which an initially neutral stimulus (the conditioned stimulus, or CS) is paired with an unconditioned stimulus (or US). The result is that the conditioned stimulus begins to elicit a conditioned response (CR). Classical conditioning is nowadays considered important as both a behavioral phenomenon and as a method to study simple associative learning. Same as Pavlovian conditioning.
Classical conditioning: Describes stimulus-stimulus associative learning.
Cochlea: Spiral bone structure in the inner ear containing auditory hair cells.
Cognitive bias modification: Using exercises (e.g., computer games) to change problematic thinking habits.
Cognitive psychology: The study of mental processes.
Cognitive-behavioral therapy (CBT): A family of approaches with the goal of changing the thoughts and behaviors that influence psychopathology.
Collective efficacy: The shared beliefs among members of a group about the group’s ability to effectively perform the tasks needed to attain a valued goal.
Collectivism: Belief system that emphasizes the duties and obligations that each person has toward others.
Commitment: The sense that a goal is both valuable and attainable
Common ground: Information that is shared by people who engage in a conversation.
Common-pool resource: A collective product or service that is freely available to all individuals of a society, but is vulnerable to overuse and degradation.
Commons dilemma game: A game in which members of a group must balance their desire for personal gain against the deterioration and possible collapse of a resource.
Comorbidity: Describes a state of having more than one psychological or physical disorder at a given time.
Computerized axial tomography: A noninvasive brain-scanning procedure that uses X-ray absorption around the head.
Concrete operations stage: Piagetian stage between ages 7 and 12 when children can think logically about concrete situations but not engage in systematic scientific reasoning.
Conditioned compensatory response: In classical conditioning, a conditioned response that opposes, rather than is the same as, the unconditioned response. It functions to reduce the strength of the unconditioned response. Often seen in conditioning when drugs are used as unconditioned stimuli.
Conditioned response: A learned reaction following classical conditioning, or the process by which an event that automatically elicits a response is repeatedly paired with another neutral stimulus (conditioned stimulus), resulting in the ability of the neutral stimulus to elicit the same response on its own.
Conditioned response (CR): The response that is elicited by the conditioned stimulus after classical conditioning has taken place.
Conditioned stimulus (CS): An initially neutral stimulus (like a bell, light, or tone) that elicits a conditioned response after it has been associated with an unconditioned stimulus.
Cones: Photoreceptors that operate in lighted environments and can encode fine visual details. There are three different kinds (S or blue, M or green and L or red) that are each sensitive to slightly different types of light. Combined, these three types of cones allow you to have color vision.
Cones: Photoreceptors of the retina sensitive to color. Located primarily in the fovea.
Confidence interval: An interval of plausible values for a population parameter; the interval of values within the margin of error of a statistic.
Conformity: Changing one’s attitude or behavior to match a perceived social norm.
Conformity: Changing one’s attitude or behavior to match a perceived social norm.
Confounds: Factors that undermine the ability to draw causal inferences from an experiment.
Conscientiousness: A personality trait consisting of self-control, orderliness, industriousness, and traditionalism.
Conscientiousness: A personality trait that reflects a person’s tendency to be careful, organized, hardworking, and to follow rules.
Conscious: Having knowledge of something external or internal to oneself; being aware of and responding to one’s surroundings.
Conscious experience: The first-person perspective of a mental event, such as feeling some sensory input, a memory, an idea, an emotion, a mood, or a continuous temporal sequence of happenings.
Conscious goal activation: When a person is fully aware of contextual influences and resulting goal-directed behavior.
Consciousness: Consciousness: the awareness or deliberate perception of a stimulus
Consciousness: Awareness of ourselves and our environment.
Conservation problems: Problems pioneered by Piaget in which physical transformation of an object or set of objects changes a perceptually salient dimension but not the quantity that is being asked about.
Consolidation: Process by which a memory trace is stabilized and transformed into a more durable form.
Consolidation: The process occurring after encoding that is believed to stabilize memory traces.
Contemplative science: A research area concerned with understanding how contemplative practices such as meditation can affect individuals, including changes in their behavior, their emotional reactivity, their cognitive abilities, and their brains. Contemplative science also seeks insights into conscious experience that can be gained from first-person observations by individuals who have gained extraordinary expertise in introspection.
Context: Stimuli that are in the background whenever learning occurs. For instance, the Skinner box or room in which learning takes place is the classic example of a context. However, “context” can also be provided by internal stimuli, such as the sensory effects of drugs (e.g., being under the influence of alcohol has stimulus properties that provide a context) and mood states (e.g., being happy or sad). It can also be provided by a specific period in time—the passage of time is sometimes said to change the “temporal context.”
Continuous development: Ways in which development occurs in a gradual incremental manner, rather than through sudden jumps.
Continuous distributions: Characteristics can go from low to high, with all different intermediate values possible. One does not simply have the trait or not have it, but can possess varying amounts of it.
Contralateral: Literally “opposite side”; used to refer to the fact that the two hemispheres of the brain process sensory information and motor commands for the opposite side of the body (e.g., the left hemisphere controls the right side of the body).
Contrast: Relative difference in the amount and type of light coming from two nearby locations.
Contrast gain: Process where the sensitivity of your visual system can be tuned to be most sensitive to the levels of contrast that are most prevalent in the environment.
Control: Feeling like you have the power to change your environment or behavior if you need or want to.
Converging evidence: Similar findings reported from multiple studies using different methods.
Cooperation: The coordination of multiple partners toward a common goal that will benefit everyone involved.
Coronal plane: A slice that runs from head to foot; brain slices in this plane are similar to slices of a loaf of bread, with the eyes being the front of the loaf.
Correlation: In statistics, the measure of relatedness of two or more variables.
Correlation: Measures the association between two variables, or how they go together.
Cost–benefit analysis: A decision-making process that compares the cost of an action or thing against the expected benefit to help determine the best course of action.
Crowds: Adolescent peer groups characterized by shared reputations or images.
Cue overload principle: The principle stating that the more memories that are associated to a particular retrieval cue, the less effective the cue will be in prompting retrieval of any one memory.
Cues: Cues: a stimulus that has a particular significance to the perceiver (e.g., a sight or a sound that has special relevance to the person who saw or heard it)
Cultural display rules: These are rules that are learned early in life that specify the management and modification of emotional expressions according to social circumstances. Cultural display rules can work in a number of different ways. For example, they can require individuals to express emotions “as is” (i.e., as they feel them), to exaggerate their expressions to show more than what is actually felt, to tone down their expressions to show less than what is actually felt, to conceal their feelings by expressing something else, or to show nothing at all.
Cultural relativism: The idea that cultural norms and values of a society can only be understood on their own terms or in their own context.
Culture: Shared, socially transmitted ideas (e.g., values, beliefs, attitudes) that are reflected in and reinforced by institutions, products, and rituals.
Culture of honor: A culture in which personal or family reputation is especially important.
Daily Diary method: A methodology where participants complete a questionnaire about their thoughts, feelings, and behavior of the day at the end of the day.
Daily hassles: Irritations in daily life that are not necessarily traumatic, but that cause difficulties and repeated stress.
Dark adaptation: Adjustment of eye to low levels of light.
Dark adaptation: Process that allows you to become sensitive to very small levels of light, so that you can actually see in the near-absence of light.
Data (also called observations): In research, information systematically collected for analysis and interpretation.
Day reconstruction method (DRM): A methodology where participants describe their experiences and behavior of a given day retrospectively upon a systematic reconstruction on the following day.
Decay: The fading of memories with the passage of time.
Declarative memory: Conscious memories for facts and events.
Decomposed games: A task in which an individual chooses from multiple allocations of resources to distribute between him- or herself and another person.
Deductive reasoning: A form of reasoning in which a given premise determines the interpretation of specific observations (e.g., All birds have feathers; since a duck is a bird, it has feathers).
Deliberative phase: The first of the two basic stages of self-regulation in which individuals decide which of many potential goals to pursue at a given point in time.
Delusions: False beliefs that are often fixed, hard to change even in the presence of conflicting information, and often culturally influenced in their content.
Dendrite: Part of a neuron that extends away from the cell body and is the main input to the neuron.
Deoxygenated hemoglobin: Hemoglobin not carrying oxygen.
Dependent: A pervasive and excessive need to be taken care of that leads to submissive and clinging behavior and fears of separation.
Dependent variable: The variable the researcher measures but does not manipulate in an experiment.
Depolarization: A change in a cell’s membrane potential, making the inside of the cell more positive and increasing the chance of an action potential.
Depressants: Depressants: a class of drugs that slow down the body’s physiological and mental processes.
Depth perception: The ability to actively perceive the distance from oneself of objects in the environment.
Descriptive norm: The perception of what most people do in a given situation.
Deviant peer contagion: The spread of problem behaviors within groups of adolescents.
Diagnostic criteria: The specific criteria used to determine whether an individual has a specific type of psychiatric disorder. Commonly used diagnostic criteria are included in the Diagnostic and Statistical Manual of Mental Disorder, 5th Edition (DSM-5) and the Internal Classification of Disorders, Version 9 (ICD-9).
Dialectical behavior therapy (DBT): A treatment often used for borderline personality disorder that incorporates both cognitive-behavioral and mindfulness elements.
Dialectical worldview: A perspective in DBT that emphasizes the joint importance of change and acceptance.
Dichotic listening: A task in which different audio streams are presented to each ear. Typically, people are asked to monitor one stream while ignoring the other.
Differential susceptibility: Genetic factors that make individuals more or less responsive to environmental experiences.
Differential threshold (or difference threshold): The smallest difference needed in order to differentiate two stimuli. (See Just Noticeable Difference (JND))
Diffuse optical imaging (DOI): A neuroimaging technique that infers brain activity by measuring changes in light as it is passed through the skull and surface of the brain.
Diffusion: The force on molecules to move from areas of high concentration to areas of low concentration.
Diffusion of responsibility: When deciding whether to help a person in need, knowing that there are others who could also provide assistance relieves bystanders of some measure of personal responsibility, reducing the likelihood that bystanders will intervene.
Directional goals: The motivation to reach a particular outcome or judgment.
Discontinuous development: Discontinuous development
Discrimination: Discrimination is behavior that advantages or disadvantages people merely based on their group membership.
Discrimination: Discrimination is behavior that advantages or disadvantages people merely based on their group membership.
Discriminative stimulus: In operant conditioning, a stimulus that signals whether the response will be reinforced. It is said to “set the occasion” for the operant response.
Disorganized behavior: Behavior or dress that is outside the norm for almost all subcultures. This would include odd dress, odd makeup (e.g., lipstick outlining a mouth for 1 inch), or unusual rituals (e.g., repetitive hand gestures).
Disorganized speech: Speech that is difficult to follow, either because answers do not clearly follow questions or because one sentence does not logically follow from another.
Dissociation: Dissociation: the heightened focus on one stimulus or thought such that many other things around you are ignored; a disconnect between one’s awareness of their environment and the one object the person is focusing on
Dissociative amnesia: Loss of autobiographical memories from a period in the past in the absence of brain injury or disease.
Distinctiveness: The principle that unusual events (in a context of similar events) will be recalled and recognized better than uniform (nondistinctive) events.
Distractor task: A task that is designed to make a person think about something unrelated to an impending decision.
Distribution: The pattern of variation in data.
Distribution: In statistics, the relative frequency that a particular value occurs for each possible value of a given variable.
Dopamine: A neurotransmitter in the brain that is thought to play an important role in regulating the function of other neurotransmitters.
Dorsal pathway: Pathway of visual processing. The “where” pathway.
Drive state: Affective experiences that motivate organisms to fulfill goals that are generally beneficial to their survival and reproduction.
Durability bias: A bias in affective forecasting in which one overestimates for how long one will feel an emotion (positive or negative) after some event.
Early adversity: Single or multiple acute or chronic stressful events, which may be biological or psychological in nature (e.g., poverty, abuse, childhood illness or injury), occurring during childhood and resulting in a biological and/or psychological stress response.
Ecological momentary assessment: An overarching term to describe methodologies that repeatedly sample participants’ real-world experiences, behavior, and physiology in real time.
Ecological validity: The degree to which a study finding has been obtained under conditions that are typical for what happens in everyday life.
Ectoderm: The outermost layer of a developing fetus.
EEG: (Electroencephalography) The recording of the brain’s electrical activity over a period of time by placing electrodes on the scalp.
Efferent nerves: Nerves that carry messages from the brain to glands and organs in the periphery.
Ego depletion: The state of diminished willpower or low energy associated with having exerted self-regulation.
Ego-depletion: The exhaustion of physiological and/or psychological resources following the completion of effortful self-control tasks, which subsequently leads to reduction in the capacity to exert more self-control.
Egoism: A motivation for helping that has the improvement of the helper’s own circumstances as its primary goal.
Electroencephalography: A technique that is used to measure gross electrical activity of the brain by placing electrodes on the scalp.
Electroencephalography (EEG): A neuroimaging technique that measures electrical brain activity via multiple electrodes on the scalp.
Electronically activated recorder, or EAR: A methodology where participants wear a small, portable audio recorder that intermittently records snippets of ambient sounds around them.
Electrostatic pressure: The force on two ions with similar charge to repel each other; the force of two ions with opposite charge to attract to one another.
Emerging adulthood: A new life stage extending from approximately ages 18 to 25, during which the foundation of an adult life is gradually constructed in love and work. Primary features include identity explorations, instability, focus on self-development, feeling incompletely adult, and a broad sense of possibilities.
Emotional intelligence: The ability to monitor one’s own and others’ feelings and emotions, to discriminate among them and to use this information to guide one’s thinking and actions. (Salovey & Mayer, 1990). EI includes four specific abilities: perceiving, using, understanding, and managing emotions.
Emotion-focused coping: Coping strategy aimed at reducing the negative emotions associated with a stressful event.
Emotions: Changes in subjective experience, physiological responding, and behavior in response to a meaningful event. Emotions tend to occur on the order of seconds (in contract to moods which may last for days).
Empathic concern: According to Batson’s empathy–altruism hypothesis, observers who empathize with a person in need (that is, put themselves in the shoes of the victim and imagine how that person feels) will experience empathic concern and have an altruistic motivation for helping.
Empathy: The ability to vicariously experience the emotions of another person.
Empathy–altruism model: An altruistic theory proposed by Batson (2011) that claims that people who put themselves in the shoes of a victim and imagining how the victim feel will experience empathic concern that evokes an altruistic motivation for helping.
Empirical: Concerned with observation and/or the ability to verify a claim.
Empirical methods: Approaches to inquiry that are tied to actual measurement and observation.
Empiricism: The belief that knowledge comes from experience.
Encoding: The initial experience of perceiving and learning events.
Encoding: Process by which information gets into memory.
Encoding: The pact of putting information into memory.
Encoding specificity principle: The hypothesis that a retrieval cue will be effective to the extent that information encoded from the cue overlaps or matches information in the engram or memory trace.
Engrams: A term indicating the change in the nervous system representing an event; also, memory trace.
Enzyme: A protein produced by a living organism that allows or helps a chemical reaction to occur.
Enzyme induction: Process through which a drug can enhance the production of an enzyme.
Episodic memory: Memory for events in a particular time and place.
Episodic memory: The ability to learn and retrieve new information or episodes in one’s life.
Ethics: Professional guidelines that offer researchers a template for making decisions that protect research participants from potential harm and that help steer scientists away from conflicts of interest or other situations that might compromise the integrity of their research.
Etiology: The causal description of all of the factors that contribute to the development of a disorder or illness.
Eugenics: The practice of selective breeding to promote desired traits.
Euphoria: Euphoria: an intense feeling of pleasure, excitement or happiness.
Eureka experience: When a creative product enters consciousness.
Evaluative priming task: An implicit attitude task that assesses the extent to which an attitude object is associated with a positive or negative valence by measuring the time it takes a person to label an adjective as good or bad after being presented with an attitude object.
Event-related potentials: A physiological measure of large electrical change in the brain produced by sensory stimulation or motor responses.
Excitatory postsynaptic potentials: A depolarizing postsynaptic current that causes the membrane potential to become more positive and move towards the threshold of excitation.
Experience-sampling method: A methodology where participants report on their momentary thoughts, feelings, and behaviors at different points in time over the course of a day.
Experimenter expectations: When the experimenter’s expectations influence the outcome of a study.
Explicit attitude: An attitude that is consciously held and can be reported on by the person holding the attitude.
Exposure therapy: A form of intervention in which the patient engages with a problematic (usually feared) situation without avoidance or escape.
External cues: Stimuli in the outside world that serve as triggers for anxiety or as reminders of past traumatic events.
External validity: The degree to which a finding generalizes from the specific sample and context of a study to some larger population and broader settings.
Extinction: Decrease in the strength of a learned behavior that occurs when the conditioned stimulus is presented without the unconditioned stimulus (in classical conditioning) or when the behavior is no longer reinforced (in instrumental conditioning). The term describes both the procedure (the US or reinforcer is no longer presented) as well as the result of the procedure (the learned response declines). Behaviors that have been reduced in strength through extinction are said to be “extinguished.”
Extraversion: A personality trait that reflects a person’s tendency to be sociable, outgoing, active, and assertive.
Extrinsic motivation: Motivation stemming from the benefits associated with achieving a goal such as obtaining a monetary reward.
Facets: Broad personality traits can be broken down into narrower facets or aspects of the trait. For example, extraversion has several facets, such as sociability, dominance, risk-taking and so forth.
Fact: Objective information about the world.
Factor analysis: A statistical technique for grouping similar things together according to how highly they are associated.
False memories: Memory for an event that never actually occurred, implanted by experimental manipulation or other means.
Falsify: In science, the ability of a claim to be tested and—possibly—refuted; a defining feature of science.
Fear conditioning: A type of classical or Pavlovian conditioning in which the conditioned stimulus (CS) is associated with an aversive unconditioned stimulus (US), such as a foot shock. As a consequence of learning, the CS comes to evoke fear. The phenomenon is thought to be involved in the development of anxiety disorders in humans.
Feelings: A general term used to describe a wide range of states that include emotions, moods, traits and that typically involve changes in subjective experience, physiological responding, and behavior in response to a meaningful event. Emotions typically occur on the order of seconds, whereas moods may last for days, and traits are tendencies to respond a certain way across various situations.
Fight or flight response: A biological reaction to alarming stressors that prepares the body to resist or escape a threat.
First-person perspective: Observations made by individuals about their own conscious experiences, also known as introspection or a subjective point of view. Phenomenology refers to the description and investigation of such observations.
Five-Factor Model: (also called the Big Five) The Five-Factor Model is a widely accepted model of personality traits. Advocates of the model believe that much of the variability in people’s thoughts, feelings, and behaviors can be summarized with five broad traits. These five traits are Openness, Conscientiousness, Extraversion, Agreeableness, and Neuroticism.
Five-Factor Model: Five broad domains or dimensions that are used to describe human personality.
Flashback: Sudden, intense re-experiencing of a previous event, usually trauma-related.
Flashbulb memory: Vivid personal memories of receiving the news of some momentous (and usually emotional) event.
Flashbulb memory: A highly detailed and vivid memory of an emotionally significant event.
Flat affect: A reduction in the display of emotions through facial expressions, gestures, and speech intonation.
Flavor: The combination of smell and taste.
Flexible Correction Model: Flexible Correction Model: the ability for people to correct or change their beliefs and evaluations if they believe these judgments have been biased (e.g., if someone realizes they only thought their day was great because it was sunny, they may revise their evaluation of the day to account for this “biasing” influence of the weather)
Flourishing: To live optimally psychologically, relationally, and spiritually.
Foils: Any member of a lineup (whether live or photograph) other than the suspect.
Forebrain: A part of the nervous system that contains the cerebral hemispheres, thalamus, and hypothalamus.
Foreclosure: Individuals commit to an identity without exploration of options.
Forgiveness: The letting go of negative thoughts, feelings, and behaviors toward an offender.
Formal operations stage: Piagetian stage starting at age 12 years and continuing for the rest of life, in which adolescents may gain the reasoning powers of educated adults.
Fornix: (plural form, fornices) A nerve fiber tract that connects the hippocampus to mammillary bodies.
Four-Branch Model: An ability model developed by Drs. Peter Salovey and John Mayer that includes four main components of EI, arranged in hierarchical order, beginning with basic psychological processes and advancing to integrative psychological processes. The branches are (1) perception of emotion, (2) use of emotion to facilitate thinking, (3) understanding emotion, and (4) management of emotion.
Free association: In psychodynamic therapy, a process in which the patient reports all thoughts that come to mind without censorship, and these thoughts are interpreted by the therapist.
Free rider problem: A situation in which one or more individuals benefit from a common-pool resource without paying their share of the cost.
Frontal lobe: The front most (anterior) part of the cerebrum; anterior to the central sulcus and responsible for motor output and planning, language, judgment, and decision-making.
Frontal lobe: The most forward region (close to forehead) of the cerebral hemispheres.
Full-cycle psychology: A scientific approach whereby researchers start with an observational field study to identify an effect in the real world, follow up with laboratory experimentation to verify the effect and isolate the causal mechanisms, and return to field research to corroborate their experimental findings.
Functional capacity: The ability to engage in self-care (cook, clean, bathe), work, attend school, and/or engage in social relationships.
Functional magnetic resonance imaging: (or fMRI) A noninvasive brain-imaging technique that registers changes in blood flow in the brain during a given task (also see magnetic resonance imaging).
Functional magnetic resonance imaging (fMRI): Functional magnetic resonance imaging (fMRI): A neuroimaging technique that infers brain activity by measuring changes in oxygen levels in the blood.
Functionalism: A school of American psychology that focused on the utility of consciousness.
Fundamental attribution error: The tendency to emphasize another person’s personality traits when describing that person’s motives and behaviors and overlooking the influence of situational factors.
G: Short for “general factor” and is often used to be synonymous with intelligence itself.
General Adaptation Syndrome: A three-phase model of stress, which includes a mobilization of physiological resources phase, a coping phase, and an exhaustion phase (i.e., when an organism fails to cope with the stress adequately and depletes its resources).
Generalizability: Related to whether the results from the sample can be generalized to a larger population.
Generalize: In research, the degree to which one can extend conclusions drawn from the findings of a study to other groups or situations not included in the study.
Generalize: Generalizing, in science, refers to the ability to arrive at broad conclusions based on a smaller sample of observations. For these conclusions to be true the sample should accurately represent the larger population from which it is drawn.
Generalized anxiety disorder (GAD): Excessive worry about everyday things that is at a level that is out of proportion to the specific causes of worry.
Gestalt psychology: An attempt to study the unity of experience.
Globus pallidus: A nucleus of the basal ganglia.
Goal: The cognitive representation of a desired state (outcome).
Goal-directed behavior: Instrumental behavior that is influenced by the animal’s knowledge of the association between the behavior and its consequence and the current value of the consequence. Sensitive to the reinforcer devaluation effect.
Grandiosity: Inflated self-esteem or an exaggerated sense of self-importance and self-worth (e.g., believing one has special powers or superior abilities).
Gratitude: A feeling of appreciation or thankfulness in response to receiving a benefit.
Gray matter: Composes the bark or the cortex of the cerebrum and consists of the cell bodies of the neurons (see also white matter).
Gray matter: The outer grayish regions of the brain comprised of the neurons’ cell bodies.
Gustation: Ability to process gustatory stimuli. Also called taste.
Gyri: (plural) Folds between sulci in the cortex.
Gyrus: (plural form, gyri) A bulge that is raised between or among fissures of the convoluted brain.
Gyrus: A fold between sulci in the cortex.
Habit: Instrumental behavior that occurs automatically in the presence of a stimulus and is no longer influenced by the animal’s knowledge of the value of the reinforcer. Insensitive to the reinforcer devaluation effect.
Habituation: Occurs when the response to a stimulus decreases with exposure.
Hallucinations: Perceptual experiences that occur even when there is no stimulus in the outside world generating the experiences. They can be auditory, visual, olfactory (smell), gustatory (taste), or somatic (touch).
Hallucinogens: Hallucinogens: substances that, when ingested, alter a person’s perceptions, often by creating hallucinations that are not real or distorting their perceptions of time.
Happiness: The popular word for subjective well-being. Scientists sometimes avoid using this term because it can refer to different things, such as feeling good, being satisfied, or even the causes of high subjective well-being.
Health: According to the World Health Organization, it is a complete state of physical, mental, and social well-being and not merely the absence of disease or infirmity.
Health behavior: Any behavior that is related to health—either good or bad.
Helpfulness: A component of the prosocial personality orientation; describes individuals who have been helpful in the past and, because they believe they can be effective with the help they give, are more likely to be helpful in the future.
Helping: Prosocial acts that typically involve situations in which one person is in need and another provides the necessary assistance to eliminate the other’s need.
Hemoglobin: The oxygen-carrying portion of a red blood cell.
Heritability coefficient: An easily misinterpreted statistical construct that purports to measure the role of genetics in the explanation of differences among individuals.
Heuristics: A mental shortcut or rule of thumb that reduces complex mental problems to more simple rule-based decisions.
HEXACO model: The HEXACO model is an alternative to the Five-Factor Model. The HEXACO model includes six traits, five of which are variants of the traits included in the Big Five (Emotionality [E], Extraversion [X], Agreeableness [A], Conscientiousness [C], and Openness [O]). The sixth factor, Honesty-Humility [H], is unique to this model.
Highlighting a goal: Prioritizing a focal goal over other goals or temptations by putting more effort into the focal goal.
High-stakes testing: Settings in which test scores are used to make important decisions about individuals. For example, test scores may be used to determine which individuals are admitted into a college or graduate school, or who should be hired for a job. Tests also are used in forensic settings to help determine whether a person is competent to stand trial or fits the legal definition of sanity.
Hippocampus: (plural form, hippocampi) A nucleus inside (medial) the temporal lobe implicated in learning and memory.
Histrionic: A pervasive pattern of excessive emotionality and attention seeking.
Homeostasis: The tendency of an organism to maintain a stable state across all the different physiological systems in the body.
Homeostatic set point: An ideal level that the system being regulated must be monitored and compared to.
Homo habilis: A human ancestor, handy man, that lived two million years ago.
Homo sapiens: Modern man, the only surviving form of the genus Homo.
Homophily: Adolescents tend to associate with peers who are similar to themselves.
Honeymoon effect: The tendency for newly married individuals to rate their spouses in an unrealistically positive manner. This represents a specific manifestation of the letter of recommendation effect when applied to ratings made by current romantic partners. Moreover, it illustrates the very important role played by relationship satisfaction in ratings made by romantic partners: As marital satisfaction declines (i.e., when the “honeymoon is over”), this effect disappears.
Horizontal plane: A slice that runs horizontally through a standing person (i.e., parallel to the floor); slices of brain in this plane divide the top and bottom parts of the brain; this plane is similar to slicing a hamburger bun.
Hostility: An experience or trait with cognitive, behavioral, and emotional components. It often includes cynical thoughts, feelings of emotion, and aggressive behavior.
Hot cognition: The mental processes that are influenced by desires and feelings.
Humility: Having an accurate view of self—not too high or low—and a realistic appraisal of one’s strengths and weaknesses, especially in relation to other people.
Humorism (or humoralism): A belief held by ancient Greek and Roman physicians (and until the 19th century) that an excess or deficiency in any of the four bodily fluids, or humors—blood, black bile, yellow bile, and phlegm—directly affected their health and temperament.
Hyperpolarization: A change in a cell’s membrane potential, making the inside of the cell more negative and decreasing the chance of an action potential.
Hypersomnia: Excessive daytime sleepiness, including difficulty staying awake or napping, or prolonged sleep episodes.
Hypnosis: Hypnosis: the state of consciousness whereby a person is highly responsive to the suggestions of another; this state usually involves a dissociation with one’s environment and an intense focus on a single stimulus, which is usually accompanied by a sense of relaxation
Hypnotherapy: Hypnotherapy: The use of hypnotic techniques such as relaxation and suggestion to help engineer desirable change such as lower pain or quitting smoking.
Hypothalamus: A portion of the brain involved in a variety of functions, including the secretion of various hormones and the regulation of hunger and sexual arousal.
Hypothalamus: Part of the diencephalon. Regulates biological drives with pituitary gland.
Hypotheses: A logical idea that can be tested.
Hypothesis: A tentative explanation that is subject to testing.
Hypothesis: A possible explanation that can be tested through research.
Hysteria: Term used by the ancient Greeks and Egyptians to describe a disorder believed to be caused by a woman’s uterus wandering throughout the body and interfering with other organs (today referred to as conversion disorder, in which psychological problems are expressed in physical form).
Identity achievement: Individuals have explored different options and then made commitments.
Identity diffusion: Adolescents neither explore nor commit to any roles or ideologies.
Imaginal performances: When imagining yourself doing well increases self-efficacy.
Immunocytochemistry: A method of staining tissue including the brain, using antibodies.
Impact bias: A bias in affective forecasting in which one overestimates the strength or intensity of emotion one will experience after some event.
Implemental phase: The second of the two basic stages of self-regulation in which individuals plan specific actions related to their selected goal.
Implicit Association Test: Implicit Association Test (IAT) measures relatively automatic biases that favor own group relative to other groups.
Implicit Association Test: An implicit attitude task that assesses a person’s automatic associations between concepts by measuring the response times in pairing the concepts.
Implicit Associations Test: Implicit Associations Test (IAT): A computer reaction time test that measures a person’s automatic associations with concepts. For instance, the IAT could be used to measure how quickly a person makes positive or negative evaluations of members of various ethnic groups.
Implicit attitude: An attitude that a person cannot verbally or overtly state.
Implicit learning: Occurs when we acquire information without intent that we cannot easily express.
Implicit measures of attitudes: Measures of attitudes in which researchers infer the participant’s attitude rather than having the participant explicitly report it.
Implicit memory: A type of long-term memory that does not require conscious thought to encode. It's the type of memory one makes without intent.
Implicit motives: These are goals that are important to a person, but that he/she cannot consciously express. Because the individual cannot verbalize these goals directly, they cannot be easily assessed via self-report. However, they can be measured using projective devices such as the Thematic Apperception Test (TAT).
Inattentional blindness: The failure to notice a fully visible, but unexpected, object or event when attention is devoted to something else.
Inattentional deafness: The auditory analog of inattentional blindness. People fail to notice an unexpected sound or voice when attention is devoted to other aspects of a scene.
Incidental learning: Any type of learning that happens without the intention to learn.
Independent: Two characteristics or traits are separate from one another-- a person can be high on one and low on the other, or vice-versa. Some correlated traits are relatively independent in that although there is a tendency for a person high on one to also be high on the other, this is not always the case.
Independent self: A model or view of the self as distinct from others and as stable across different situations. The goal of the independent self is to express and assert the self, and to influence others. This model of self is prevalent in many individualistic, Western contexts (e.g., the United States, Australia, Western Europe).
Independent variable: The variable the researcher manipulates and controls in an experiment.
Individual differences: Ways in which people differ in terms of their behavior, emotion, cognition, and development.
Individualism: Belief system that exalts freedom, independence, and individual choice as high values.
Induction: To draw general conclusions from specific observations.
Inductive reasoning: A form of reasoning in which a general conclusion is inferred from a set of observations (e.g., noting that “the driver in that car was texting; he just cut me off then ran a red light!” (a specific observation), which leads to the general conclusion that texting while driving is dangerous).
Industrialized countries: The economically advanced countries of the world, in which most of the world’s wealth is concentrated.
Information processing theories: Theories that focus on describing the cognitive processes that underlie thinking at any one age and cognitive growth over time.
Informational influence: Conformity that results from a concern to act in a socially approved manner as determined by how others act.
Ingroup: Group to which a person belongs.
Inhibitory postsynaptic potentials: A hyperpolarizing postsynaptic current that causes the membrane potential to become more negative and move away from the threshold of excitation.
Instrumental conditioning: Process in which animals learn about the relationship between their behaviors and their consequences. Also known as operant conditioning.
Integrative or eclectic psychotherapy: Also called integrative psychotherapy, this term refers to approaches combining multiple orientations (e.g., CBT with psychoanalytic elements).
Integrative or eclectic psychotherapy: Also called integrative psychotherapy, this term refers to approaches combining multiple orientations (e.g., CBT with psychoanalytic elements).
Intelligence: An individual’s cognitive capability. This includes the ability to acquire, process, recall and apply information.
Intentional learning: Any type of learning that happens when motivated by intention.
Interdependent self: A model or view of the self as connected to others and as changing in response to different situations. The goal of the interdependent self is to suppress personal preferences and desires, and to adjust to others. This model of self is prevalent in many collectivistic, East Asian contexts (e.g., China, Japan, Korea).
Interference: Other memories get in the way of retrieving a desired memory
Interindividual-intergroup discontinuity: The tendency for relations between groups to be less cooperative than relations between individuals.
Internal bodily or somatic cues: Physical sensations that serve as triggers for anxiety or as reminders of past traumatic events.
Internal validity: The degree to which a cause-effect relationship between two variables has been unambiguously established.
Interoceptive avoidance: Avoidance of situations or activities that produce sensations of physical arousal similar to those occurring during a panic attack or intense fear response.
Interpersonal: This refers to the relationship or interaction between two or more individuals in a group. Thus, the interpersonal functions of emotion refer to the effects of one’s emotion on others, or to the relationship between oneself and others.
Intrapersonal: This refers to what occurs within oneself. Thus, the intrapersonal functions of emotion refer to the effects of emotion to individuals that occur physically inside their bodies and psychologically inside their minds.
Intrinsic motivation: Motivation stemming from the benefits associated with the process of pursuing a goal such as having a fulfilling experience.
Introspection: A method of focusing on internal processes.
Invasive Procedure: A procedure that involves the skin being broken or an instrument or chemical being introduced into a body cavity.
Ion channels: Proteins that span the cell membrane, forming channels that specific ions can flow through between the intracellular and extracellular space.
Ionotropic receptor: Ion channel that opens to allow ions to permeate the cell membrane under specific conditions, such as the presence of a neurotransmitter or a specific membrane potential.
IQ: Short for “intelligence quotient.” This is a score, typically obtained from a widely used measure of intelligence that is meant to rank a person’s intellectual ability against that of others.
Jet Lag: Jet Lag: The state of being fatigued and/or having difficulty adjusting to a new time zone after traveling a long distance (across multiple time zones).
Just noticeable difference (JND): The smallest difference needed in order to differentiate two stimuli. (see Differential Threshold)
Kin selection: According to evolutionary psychology, the favoritism shown for helping our blood relatives, with the goals of increasing the likelihood that some portion of our DNA will be passed on to future generations.
Lateral geniculate nucleus: (or LGN) A nucleus in the thalamus that is innervated by the optic nerves and sends signals to the visual cortex in the occipital lobe.
Lateral inhibition: A signal produced by a neuron aimed at suppressing the response of nearby neurons.
Lateral sulcus: The major fissure that delineates the temporal lobe below the frontal and the parietal lobes.
Lateralized: To the side; used to refer to the fact that specific functions may reside primarily in one hemisphere or the other (e.g., for the majority individuals, the left hemisphere is most responsible for language).
Law of effect: The idea that instrumental or operant responses are influenced by their effects. Responses that are followed by a pleasant state of affairs will be strengthened and those that are followed by discomfort will be weakened. Nowadays, the term refers to the idea that operant or instrumental behaviors are lawfully controlled by their consequences.
Lesion: A region in the brain that suffered damage through injury, disease, or medical intervention.
Lesion studies: A surgical method in which a part of the animal brain is removed to study its effects on behavior or function.
Lesions: Abnormalities in the tissue of an organism usually caused by disease or trauma.
Letter of recommendation effect: The general tendency for informants in personality studies to rate others in an unrealistically positive manner. This tendency is due a pervasive bias in personality assessment: In the large majority of published studies, informants are individuals who like the person they are rating (e.g., they often are friends or family members) and, therefore, are motivated to depict them in a socially desirable way. The term reflects a similar tendency for academic letters of recommendation to be overly positive and to present the referent in an unrealistically desirable manner.
Levels of analysis: Complementary views for analyzing and understanding a phenomenon.
Levels of analysis: In science, there are complementary understandings and explanations of phenomena.
Lexical hypothesis: The lexical hypothesis is the idea that the most important differences between people will be encoded in the language that we use to describe people. Therefore, if we want to know which personality traits are most important, we can look to the language that people use to describe themselves and others.
Lexicon: Words and expressions.
Life satisfaction: A person reflects on their life and judges to what degree it is going well, by whatever standards that person thinks are most important for a good life.
Light adaptation: Adjustment of eye to high levels of light.
Limbic system: A loosely defined network of nuclei in the brain involved with learning and emotion.
Limbic system: Includes the subcortical structures of the amygdala and hippocampal formation as well as some cortical structures; responsible for aversion and gratification.
Linguistic inquiry and word count: A quantitative text analysis methodology that automatically extracts grammatical and psychological information from a text by counting word frequencies.
Linguistic intergroup bias: A tendency for people to characterize positive things about their ingroup using more abstract expressions, but negative things about their outgroups using more abstract expressions.
Lived day analysis: A methodology where a research team follows an individual around with a video camera to objectively document a person’s daily life as it is lived.
Longitudinal study: A study that follows the same group of individuals over time.
Lordosis: A physical sexual posture in females that serves as an invitation to mate.
Magnetic resonance imaging: Or MRI is a brain imaging noninvasive technique that uses magnetic energy to generate brain images (also see fMRI).
Magnetic resonance imaging: A set of techniques that uses strong magnets to measure either the structure of the brain (e.g., gray matter and white matter) or how the brain functions when a person performs cognitive tasks (e.g., working memory or episodic memory) or other types of tasks.
Magnification factor: Cortical space projected by an area of sensory input (e.g., mm of cortex per degree of visual field).
Maladaptive: Term referring to behaviors that cause people who have them physical or emotional harm, prevent them from functioning in daily life, and/or indicate that they have lost touch with reality and/or cannot control their thoughts and behavior (also called dysfunctional).
Margin of error: The expected amount of random variation in a statistic; often defined for 95% confidence level.
Mayer-Salovey-Caruso Emotional Intelligence Test (MSCEIT): A 141-item performance assessment of EI that measures the four emotion abilities (as defined by the four-branch model of EI) with a total of eight tasks.
Mechanoreceptors: Mechanical sensory receptors in the skin that response to tactile stimulation.
Medial temporal lobes: Inner region of the temporal lobes that includes the hippocampus.
Medulla oblongata: An area just above the spinal cord that processes breathing, digestion, heart and blood vessel function, swallowing, and sneezing.
Melatonin: Melatonin: A hormone associated with increased drowsiness and sleep.
Memory traces: A term indicating the change in the nervous system representing an event.
Mere-exposure effects: The result of developing a more positive attitude towards a stimulus after repeated instances of mere exposure to it.
Mesmerism: Derived from Franz Anton Mesmer in the late 18th century, an early version of hypnotism in which Mesmer claimed that hysterical symptoms could be treated through animal magnetism emanating from Mesmer’s body and permeating the universe (and later through magnets); later explained in terms of high suggestibility in individuals.
Metabolism: Breakdown of substances.
Metabolite: A substance necessary for a living organism to maintain life.
Metacognition: Describes the knowledge and skills people have in monitoring and controlling their own learning and memory.
Mind–body connection: The idea that our emotions and thoughts can affect how our body functions.
Mindfulness: Mindfulness: a state of heightened focus on the thoughts passing through one’s head, as well as a more controlled evaluation of those thoughts (e.g., do you reject or support the thoughts you’re having?)
Mindfulness: A process that reflects a nonjudgmental, yet attentive, mental state.
Mindfulness-based therapy: A form of psychotherapy grounded in mindfulness theory and practice, often involving meditation, yoga, body scan, and other features of mindfulness exercises.
Misinformation effect: A memory error caused by exposure to incorrect information between the original event (e.g., a crime) and later memory test (e.g., an interview, lineup, or day in court).
Misinformation effect: When erroneous information occurring after an event is remembered as having been part of the original event.
Mixed and Trait Models: Approaches that view EI as a combination of self-perceived emotion skills, personality traits, and attitudes.
Mnemonic devices: A strategy for remembering large amounts of information, usually involving imaging events occurring on a journey or with some other set of memorized cues.
Mock witnesses: A research subject who plays the part of a witness in a study.
Model minority: A minority group whose members are perceived as achieving a higher degree of socioeconomic success than the population average.
Monitoring: Keeping track of a target behavior that is to be regulated.
Mood-congruent memory: The tendency to be better able to recall memories that have a mood similar to our current mood.
Moratorium: State in which adolescents are actively exploring options but have not yet made identity commitments.
Motivated skepticism: A form of bias that can result from having a directional goal in which one is skeptical of evidence despite its strength because it goes against what one wants to believe.
Motivation: The psychological driving force that enables action in the course of goal pursuit.
Motor cortex: Region of the frontal lobe responsible for voluntary movement; the motor cortex has a contralateral representation of the human body.
Multimodal perception: The effects that concurrent stimulation in more than one sensory modality has on the perception of events and objects in the world.
Myelin: Fatty tissue, produced by glial cells (see module, “Neurons”) that insulates the axons of the neurons; myelin is necessary for normal conduction of electrical impulses among neurons.
Myelin sheath: Substance around the axon of a neuron that serves as insulation to allow the action potential to conduct rapidly toward the terminal buttons.
Narcissistic: A pervasive pattern of grandiosity (in fantasy or behavior), need for admiration, and lack of empathy.
Nature: The genes that children bring with them to life and that influence all aspects of their development.
Need for closure: The desire to come to a decision that will resolve ambiguity and conclude an issue.
Need to belong: A strong natural impulse in humans to form social connections and to be accepted by others.
Negative feelings: Undesirable and unpleasant feelings that people tend to avoid if they can. Moods and emotions such as depression, anger, and worry are examples.
Negative state relief model: An egoistic theory proposed by Cialdini et al. (1982) that claims that people have learned through socialization that helping can serve as a secondary reinforcement that will relieve negative moods such as sadness.
Neural crest: A set of primordial neurons that migrate outside the neural tube and give rise to sensory and autonomic neurons in the peripheral nervous system.
Neural impulse: An electro-chemical signal that enables neurons to communicate.
Neural induction: A process that causes the formation of the neural tube.
Neural plasticity: The ability of synapses and neural pathways to change over time and adapt to changes in neural process, behavior, or environment.
Neuroblasts: Brain progenitor cells that asymmetrically divide into other neuroblasts or nerve cells.
Neurodevelopmental: Processes that influence how the brain develops either in utero or as the child is growing up.
Neuroepithelium: The lining of the neural tube.
Neuroscience methods: A research method that deals with the structure or function of the nervous system and brain.
Neuroticism: A personality trait that reflects the tendency to be interpersonally sensitive and the tendency to experience negative emotions like anxiety, fear, sadness, and anger.
Neurotransmitter: A chemical substance produced by a neuron that is used for communication between neurons.
Neurotransmitters: Chemical substance released by the presynaptic terminal button that acts on the postsynaptic cell.
Nociception: Our ability to sense pain.
Nomenclature: Naming conventions.
Nonassociative learning: Occurs when a single repeated exposure leads to a change in behavior.
Nonconscious goal activation: When activation occurs outside a person’s awareness, such that the person is unaware of the reasons behind her goal-directed thoughts and behaviors.
Non-industrialized countries: The less economically advanced countries that comprise the majority of the world’s population. Most are currently developing at a rapid rate.
Noninvasive procedure: A procedure that does not require the insertion of an instrument or chemical through the skin or into a body cavity.
Norm: Assessments are given to a representative sample of a population to determine the range of scores for that population. These “norms” are then used to place an individual who takes that assessment on a range of scores in which he or she is compared to the population at large.
Normative influence: Conformity that results from a concern for what other people think of us.
Nucleus: Collection of nerve cells found in the brain which typically serve a specific function.
Null-hypothesis significance testing (NHST): In statistics, a test created to determine the chances that an alternative hypothesis would produce a result as extreme as the one observed if the null hypothesis were actually true.
Numerical magnitudes: The sizes of numbers.
Nurture: The environments, starting with the womb, that influence all aspects of children’s development.
Obedience: Responding to an order or command from a person in a position of authority.
Obedience: Responding to an order or command from a person in a position of authority.
Object permanence task: The Piagetian task in which infants below about 9 months of age fail to search for an object that is removed from their sight and, if not allowed to search immediately for the object, act as if they do not know that it continues to exist.
Objective: Being free of personal bias.
Observational learning: Learning by observing the behavior of others.
Observational learning: Learning by observing the behavior of others.
Obsessive-compulsive: A pervasive pattern of preoccupation with orderliness, perfectionism, and mental and interpersonal control, at the expense of flexibility, openness, and efficiency.
Obsessive-compulsive disorder (OCD): A disorder characterized by the desire to engage in certain behaviors excessively or compulsively in hopes of reducing anxiety. Behaviors include things such as cleaning, repeatedly opening and closing doors, hoarding, and obsessing over certain thoughts.
Occipital lobe: The back most (posterior) part of the cerebrum; involved in vision.
Occipital lobe: The back part of the cerebrum, which houses the visual areas.
Odorants: Chemicals transduced by olfactory receptors.
OECD countries: Members of the Organization for Economic Co-operation and Development, comprised of the world’s wealthiest countries.
Olfaction: Ability to process olfactory stimuli. Also called smell.
Olfactory epithelium: Organ containing olfactory receptors.
Openness to Experience: A personality trait that reflects a person’s tendency to seek out and to appreciate new things, including thoughts, feelings, values, and experiences.
Operant: A behavior that is controlled by its consequences. The simplest example is the rat’s lever-pressing, which is controlled by the presentation of the reinforcer.
Operant conditioning: Describes stimulus-response associative learning.
Operant conditioning: See instrumental conditioning.
Operational definitions: How researchers specifically measure a concept.
Opponent Process Theory: Theory of color vision that assumes there are four different basic colors, organized into two pairs (red/green and blue/yellow) and proposes that colors in the world are encoded in terms of the opponency (or difference) between the colors in each pair. There is an additional black/white pair responsible for coding light contrast.
Opponent-process theory: Theory proposing color vision as influenced by cells responsive to pairs of colors.
Ossicles: A collection of three small bones in the middle ear that vibrate against the tympanic membrane.
Other-oriented empathy: A component of the prosocial personality orientation; describes individuals who have a strong sense of social responsibility, empathize with and feel emotionally tied to those in need, understand the problems the victim is experiencing, and have a heightened sense of moral obligations to be helpful.
Outgroup: Group to which a person does not belong.
Outgroup: A social category or group with which an individual does not identify.
Oxygenated hemoglobin: Hemoglobin carrying oxygen.
Panic disorder (PD): A condition marked by regular strong panic attacks, and which may include significant levels of worry about future attacks.
Parameter: A numerical result summarizing a population (e.g., mean, proportion).
Paranoid: A pervasive distrust and suspiciousness of others such that their motives are interpreted as malevolent.
Parasympathetic nervous system: A division of the autonomic nervous system that is slower than its counterpart—that is, the sympathetic nervous system—and works in opposition to it. Generally engaged in “rest and digest” functions.
Parasympathetic nervous system (PNS): One of the two major divisions of the autonomic nervous system, responsible for stimulation of “rest and digest” activities.
Parietal lobe: An area of the cerebrum just behind the central sulcus that is engaged with somatosensory and gustatory sensation.
Parietal lobe: The part of the cerebrum between the frontal and occipital lobes; involved in bodily sensations, visual attention, and integrating the senses.
Participant demand: When participants behave in a way that they think the experimenter wants them to behave.
Pavlovian conditioning: See classical conditioning.
Perception: The psychological process of interpreting sensory information.
Perceptual learning: Occurs when aspects of our perception changes as a function of experience.
Performance assessment: A method of measurement associated with ability models of EI that evaluate the test taker’s ability to solve emotion-related problems.
Performance experiences: When past successes or failures lead to changes in self-efficacy.
Peripheral nervous system: The part of the nervous system that is outside the brain and spinal cord.
Personal distress: According to Batson’s empathy–altruism hypothesis, observers who take a detached view of a person in need will experience feelings of being “worried” and “upset” and will have an egoistic motivation for helping to relieve that distress.
Personality: Enduring predispositions that characterize a person, such as styles of thought, feelings and behavior.
Personality: Characteristic, routine ways of thinking, feeling, and relating to others.
Personality disorders: When personality traits result in significant distress, social impairment, and/or occupational impairment.
Personality traits: Enduring dispositions in behavior that show differences across individuals, and which tend to characterize the person across varying types of situations.
Person-centered therapy: A therapeutic approach focused on creating a supportive environment for self-discovery.
Person-situation debate: The person-situation debate is a historical debate about the relative power of personality traits as compared to situational influences on behavior. The situationist critique, which started the person-situation debate, suggested that people overestimate the extent to which personality traits are consistent across situations.
Phantom limb: The perception that a missing limb still exists.
Phantom limb pain: Pain in a limb that no longer exists.
Pharmacokinetics: The action of a drug through the body, including absorption, distribution, metabolism, and excretion.
Phonemic awareness: Awareness of the component sounds within words.
Photo spreads: A selection of normally small photographs of faces given to a witness for the purpose of identifying a perpetrator.
Photoactivation: A photochemical reaction that occurs when light hits photoreceptors, producing a neural signal.
Phrenology: A now-discredited field of brain study, popular in the first half of the 19th century that correlated bumps and indentations of the skull with specific functions of the brain.
Piaget’s theory: Theory that development occurs through a sequence of discontinuous stages: the sensorimotor, preoperational, concrete operational, and formal operational stages.
Pinna: Outermost portion of the ear.
Placebo effect: When receiving special treatment or something new affects human behavior.
Planning fallacy: A cognitive bias in which one underestimates how long it will take to complete a task.
Pluralistic ignorance: Relying on the actions of others to define an ambiguous need situation and to then erroneously conclude that no help or intervention is necessary.
Polypharmacy: The use of many medications.
Pons: A bridge that connects the cerebral cortex with the medulla, and reciprocally transfers information back and forth between the brain and the spinal cord.
Population: A larger collection of individuals that we would like to generalize our results to.
Population: In research, all the people belonging to a particular group (e.g., the population of left handed people).
Positive feelings: Desirable and pleasant feelings. Moods and emotions such as enjoyment and love are examples.
Positive psychology: The science of human flourishing. Positive Psychology is an applied science with an emphasis on real world intervention.
Positron: A particle having the same mass and numerically equal but positive charge as an electron.
Positron emission tomography: A technique that uses radio-labelled ligands to measure the distribution of different neurotransmitter receptors in the brain or to measure how much of a certain type of neurotransmitter is released when a person is given a specific type of drug or does a particularly cognitive task.
Positron Emission Tomography: (or PET) An invasive procedure that captures brain images with positron emissions from the brain after the individual has been injected with radio-labeled isotopes.
Positron emission tomography (PET): A neuroimaging technique that measures brain activity by detecting the presence of a radioactive substance in the brain that is initially injected into the bloodstream and then pulled in by active brain tissue.
Posttraumatic stress disorder (PTSD): A sense of intense fear, triggered by memories of a past traumatic event, that another traumatic event might occur. PTSD may include feelings of isolation and emotional numbing.
Practitioner-Scholar Model: A model of training of professional psychologists that emphasizes clinical practice.
Prediction error: When the outcome of a conditioning trial is different from that which is predicted by the conditioned stimuli that are present on the trial (i.e., when the US is surprising). Prediction error is necessary to create Pavlovian conditioning (and associative learning generally). As learning occurs over repeated conditioning trials, the conditioned stimulus increasingly predicts the unconditioned stimulus, and prediction error declines. Conditioning works to correct or reduce prediction error.
Prejudice: An evaluation or emotion toward people based merely on their group membership.
Prejudice: Prejudice is an evaluation or emotion toward people merely based on their group membership.
Preoperational reasoning stage: Period within Piagetian theory from age 2 to 7 years, in which children can represent objects through drawing and language but cannot solve logical reasoning problems, such as the conservation problems.
Preoptic area: A region in the anterior hypothalamus involved in generating and regulating male sexual behavior.
Preparedness: The idea that an organism’s evolutionary history can make it easy to learn a particular association. Because of preparedness, you are more likely to associate the taste of tequila, and not the circumstances surrounding drinking it, with getting sick. Similarly, humans are more likely to associate images of spiders and snakes than flowers and mushrooms with aversive outcomes like shocks.
Prevention focus: One of two self-regulatory orientations emphasizing safety, responsibility, and security needs, and viewing goals as “oughts.” This self-regulatory focus seeks to avoid losses (the presence of negatives) and approach non-losses (the absence of negatives).
Primary auditory cortex: Area of the cortex involved in processing auditory stimuli.
Primary Motor Cortex: A strip of cortex just in front of the central sulcus that is involved with motor control.
Primary Somatosensory Cortex: A strip of cerebral tissue just behind the central sulcus engaged in sensory reception of bodily sensations.
Primary somatosensory cortex: Area of the cortex involved in processing somatosensory stimuli.
Primary visual cortex: Area of the cortex involved in processing visual stimuli.
Primary visual cortex (V1): Brain region located in the occipital cortex (toward the back of the head) responsible for processing basic visual information like the detection, thickness, and orientation of simple lines, color, and small-scale motion.
Primed: A process by which a concept or behavior is made more cognitively accessible or likely to occur through the presentation of an associated concept.
Priming: A stimulus presented to a person reminds him or her about other ideas associated with the stimulus.
Priming: Priming: the activation of certain thoughts or feelings that make them easier to think of and act upon
Principle of inverse effectiveness: The finding that, in general, for a multimodal stimulus, if the response to each unimodal component (on its own) is weak, then the opportunity for multisensory enhancement is very large. However, if one component—by itself—is sufficient to evoke a strong response, then the effect on the response gained by simultaneously processing the other components of the stimulus will be relatively small.
Prisoner’s dilemma: A classic paradox in which two individuals must independently choose between defection (maximizing reward to the self) and cooperation (maximizing reward to the group).
Probability: A measure of the degree of certainty of the occurrence of an event.
Probability values: In statistics, the established threshold for determining whether a given value occurs by chance.
Problem-focused coping: A set of coping strategies aimed at improving or changing stressful situations.
Processing speed: The speed with which an individual can perceive auditory or visual information and respond to it.
Progress: The perception of reducing the discrepancy between one’s current state and one’s desired state in goal pursuit.
Projective hypothesis: The theory that when people are confronted with ambiguous stimuli (that is, stimuli that can be interpreted in more than one way), their responses will be influenced by their unconscious thoughts, needs, wishes, and impulses. This, in turn, is based on the Freudian notion of projection, which is the idea that people attribute their own undesirable/unacceptable characteristics to other people or objects.
Promotion focus: One of two self-regulatory orientations emphasizing hopes, accomplishments, and advancement needs, and viewing goals as “ideals.” This self-regulatory focus seeks to approach gains (the presence of positives) and avoid non-gains (the absence of positives).
Pro-social: Thoughts, actions, and feelings that are directed towards others and which are positive in nature.
Prosocial behavior: Social behavior that benefits another person.
Prosocial personality orientation: A measure of individual differences that identifies two sets of personality characteristics (other-oriented empathy, helpfulness) that are highly correlated with prosocial behavior.
Pseudoscience: Beliefs or practices that are presented as being scientific, or which are mistaken for being scientific, but which are not scientific (e.g., astrology, the use of celestial bodies to make predictions about human behaviors, and which presents itself as founded in astronomy, the actual scientific study of celestial objects. Astrology is a pseudoscience unable to be falsified, whereas astronomy is a legitimate scientific discipline).
Psychoactive drugs: A drug that changes mood or the way someone feels.
Psychoanalytic therapy: Sigmund Freud’s therapeutic approach focusing on resolving unconscious conflicts.
Psychodynamic therapy: Treatment applying psychoanalytic principles in a briefer, more individualized format.
Psychogenesis: Developing from psychological origins.
Psychological control: Parents’ manipulation of and intrusion into adolescents’ emotional and cognitive world through invalidating adolescents’ feelings and pressuring them to think in particular ways.
Psychological vulnerabilities: Influences that our early experiences have on how we view the world.
Psychomotor agitation: Increased motor activity associated with restlessness, including physical actions (e.g., fidgeting, pacing, feet tapping, handwringing).
Psychomotor retardation: A slowing of physical activities in which routine activities (e.g., eating, brushing teeth) are performed in an unusually slow manner.
Psychoneuroimmunology: A field of study examining the relationship among psychology, brain function, and immune function.
Psychopathology: Illnesses or disorders that involve psychological or psychiatric symptoms.
Psychophysics: Study of the relationships between physical stimuli and the perception of those stimuli.
Psychophysiological methods: Any research method in which the dependent variable is a physiological measure and the independent variable is behavioral or mental (such as memory).
Psychosomatic medicine: An interdisciplinary field of study that focuses on how biological, psychological, and social processes contribute to physiological changes in the body and health over time.
Psychotropic drug: A drug that changes mood or emotion, usually used when talking about drugs prescribed for various mental conditions (depression, anxiety, schizophrenia, etc.).
Punisher: A stimulus that decreases the strength of an operant behavior when it is made a consequence of the behavior.
P-value: The probability of observing a particular outcome in a sample, or more extreme, under a conjecture about the larger population or process.
Qualitative changes: Large, fundamental change, as when a caterpillar changes into a butterfly; stage theories such as Piaget’s posit that each stage reflects qualitative change relative to previous stages.
Quantitative changes: Gradual, incremental change, as in the growth of a pine tree’s girth.
Quantitative genetics: Scientific and mathematical methods for inferring genetic and environmental processes based on the degree of genetic and environmental similarity among organisms.
Quantitative law of effect: A mathematical rule that states that the effectiveness of a reinforcer at strengthening an operant response depends on the amount of reinforcement earned for all alternative behaviors. A reinforcer is less effective if there is a lot of reinforcement in the environment for other behaviors.
Quasi-experimental design: An experiment that does not require random assignment to conditions.
Random assignment: Using a probability-based method to divide a sample into treatment groups.
Random assignment: Assigning participants to receive different conditions of an experiment by chance.
Random sampling: Using a probability-based method to select a subset of individuals for the sample from the population.
Rational self-interest: The principle that people will make logical decisions based on maximizing their own gains and benefits.
Realism: A point of view that emphasizes the importance of the senses in providing knowledge of the external world.
Reappraisal, or Cognitive restructuring: The process of identifying, evaluating, and changing maladaptive thoughts in psychotherapy.
Reciprocal altruism: According to evolutionary psychology, a genetic predisposition for people to help those who have previously helped them.
Reciprocity: The act of exchanging goods or services. By giving a person a gift, the principle of reciprocity can be used to influence others; they then feel obligated to give back.
Recoding: The ubiquitous process during learning of taking information in one form and converting it to another form, usually one more easily remembered.
Reference group effect: The tendency of people to base their self-concept on comparisons with others. For example, if your friends tend to be very smart and successful, you may come to see yourself as less intelligent and successful than you actually are. Informants also are prone to these types of effects. For instance, the sibling contrast effect refers to the tendency of parents to exaggerate the true extent of differences between their children.
Reinforced response: Following the process of operant conditioning, the strengthening of a response following either the delivery of a desired consequence (positive reinforcement) or escape from an aversive consequence.
Reinforcer: Any consequence of a behavior that strengthens the behavior or increases the likelihood that it will be performed it again.
Reinforcer devaluation effect: The finding that an animal will stop performing an instrumental response that once led to a reinforcer if the reinforcer is separately made aversive or undesirable.
Reliablility: The consistency of test scores across repeated assessments. For example, test-retest reliability examines the extent to which scores change over time.
Renewal effect: Recovery of an extinguished response that occurs when the context is changed after extinction. Especially strong when the change of context involves return to the context in which conditioning originally occurred. Can occur after extinction in either classical or instrumental conditioning.
Representative: In research, the degree to which a sample is a typical example of the population from which it is drawn.
Representativeness heuristic: A heuristic in which the likelihood of an object belonging to a category is evaluated based on the extent to which the object appears similar to one’s mental representation of the category.
Research confederate: A person working with a researcher, posing as a research participant or as a bystander.
Research participant: A person being studied as part of a research program.
Resilience: The ability to “bounce back” from negative situations (e.g., illness, stress) to normal functioning or to simply not show poor outcomes in the face of adversity. In some cases, resilience may lead to better functioning following the negative experience (e.g., post-traumatic growth).
Resting membrane potential: The voltage inside the cell relative to the voltage outside the cell while the cell is a rest (approximately -70 mV).
Retina: Cell layer in the back of the eye containing photoreceptors.
Retrieval: The process of accessing stored information.
Retrieval: Process by which information is accessed from memory and utilized.
Retroactive interference: The phenomenon whereby events that occur after some particular event of interest will usually cause forgetting of the original event.
Retrograde amnesia: Inability to retrieve memories for facts and events acquired before the onset of amnesia.
Reward value: A neuropsychological measure of an outcome’s affective importance to an organism.
Right-wing authoritarianism: Right-wing authoritarianism (RWA) focuses on value conflicts but endorses respect for obedience and authority in the service of group conformity.
Rods: Photoreceptors that are very sensitive to light and are mostly responsible for night vision.
Rods: Photoreceptors of the retina sensitive to low levels of light. Located around the fovea.
Rostrocaudal: A front-back plane used to identify anatomical structures in the body and the brain.
SAD performance only: Social anxiety disorder which is limited to certain situations that the sufferer perceives as requiring some type of performance.
Sagittal plane: A slice that runs vertically from front to back; slices of brain in this plane divide the left and right side of the brain; this plane is similar to slicing a baked potato lengthwise.
Sample: The collection of individuals on which we collect data.
Sample: In research, a number of people selected from a population to serve as an example of that population.
Sapir-Whorf hypothesis: The hypothesis that the language that people use determines their thoughts.
Satiation: The state of being full to satisfaction and no longer desiring to take on more.
Schema: A mental representation or set of beliefs about something.
Schema: A mental model or representation that organizes the important information about a thing, person, or event (also known as a script).
Schema (plural: schemata): A memory template, created through repeated exposure to a particular class of objects or events.
Schizoid: A pervasive pattern of detachment from social relationships and a restricted range of expression of emotions in interpersonal settings.
Schizotypal: A pervasive pattern of social and interpersonal deficits marked by acute discomfort with, and reduced capacity for, close relationships as well as perceptual distortions and eccentricities of behavior.
Scientific theory: An explanation for observed phenomena that is empirically well-supported, consistent, and fruitful (predictive).
Scientist-practitioner model: A model of training of professional psychologists that emphasizes the development of both research and clinical skills.
Selective listening: A method for studying selective attention in which people focus attention on one auditory stream of information while deliberately ignoring other auditory information.
Self-categorization theory: Self-categorization theory develops social identity theory’s point that people categorize themselves, along with each other into groups, favoring their own group.
Self-control: The capacity to control impulses, emotions, desires, and actions in order to resist a temptation and adhere to a valued goal.
Self-efficacy: The belief that you are able to effectively perform the tasks needed to attain a valued goal.
Self-efficacy: The belief that one can perform adequately in a specific situation.
Self-enhancement bias: The tendency for people to see and/or present themselves in an overly favorable way. This tendency can take two basic forms: defensiveness (when individuals actually believe they are better than they really are) and impression management (when people intentionally distort their responses to try to convince others that they are better than they really are). Informants also can show enhancement biases. The general form of this bias has been called the letter-of-recommendation effect, which is the tendency of informants who like the person they are rating (e.g., friends, relatives, romantic partners) to describe them in an overly favorable way. In the case of newlyweds, this tendency has been termed the honeymoon effect.
Self-regulation: The processes through which individuals alter their emotions, desires, and actions in the course of pursuing a goal.
Self-regulation: The process of altering one’s responses, including thoughts, feelings, impulses, actions, and task performance.
Self-regulation: The complex process through which people control their thoughts, emotions, and actions.
Self-report assessment: A method of measurement associated with mixed and trait models of EI, which evaluates the test taker’s perceived emotion-related skills, distinct personality traits, and other characteristics.
Self-report measure: A type of questionnaire in which participants answer questions whose answers correspond to numerical values that can be added to create an overall index of some construct.
Semantic memory: The more or less permanent store of knowledge that people have.
Sensation: The physical processing of environmental stimuli by the sense organs.
Sensitization: Occurs when the response to a stimulus increases with exposure
Sensorimotor stage: Period within Piagetian theory from birth to age 2 years, during which children come to represent the enduring reality of objects.
Sensory adaptation: Decrease in sensitivity of a receptor to a stimulus after constant stimulation.
Shape theory of olfaction: Theory proposing that odorants of different size and shape correspond to different smells.
Sibling contrast effect: The tendency of parents to use their perceptions of all of their children as a frame of reference for rating the characteristics of each of them. For example, suppose that a mother has three children; two of these children are very sociable and outgoing, whereas the third is relatively average in sociability. Because of operation of this effect, the mother will rate this third child as less sociable and outgoing than he/she actually is. More generally, this effect causes parents to exaggerate the true extent of differences between their children. This effect represents a specific manifestation of the more general reference group effect when applied to ratings made by parents.
Signal detection: Method for studying the ability to correctly identify sensory stimuli.
Situation model: A mental representation of an event, object, or situation constructed at the time of comprehending a linguistic description.
Social and cultural: Society refers to a system of relationships between individuals and groups of individuals; culture refers to the meaning and information afforded to that system that is transmitted across generations. Thus, the social and cultural functions of emotion refer to the effects that emotions have on the functioning and maintenance of societies and cultures.
Social and emotional learning (SEL): The real-world application of EI in an educational setting and/or classroom that involves curricula that teach the process of integrating thinking, feeling, and behaving in order to become aware of the self and of others, make responsible decisions, and manage one’s own behaviors and those of others (Elias et al., 1997)
Social anxiety disorder (SAD): A condition marked by acute fear of social situations which lead to worry and diminished day to day functioning.
Social attribution: The way a person explains the motives or behaviors of others.
Social brain hypothesis: The hypothesis that the human brain has evolved, so that humans can maintain larger ingroups.
Social cognition: The study of how people think about the social world.
Social cognition: The way people process and apply information about others.
Social constructivism: Social constructivism proposes that knowledge is first created and learned within a social context and is then adopted by individuals.
Social dominance orientation: Social dominance orientation (SDO) describes a belief that group hierarchies are inevitable in all societies and even good, to maintain order and stability.
Social identity: A person’s sense of who they are, based on their group membership(s).
Social identity theory: Social identity theory notes that people categorize each other into groups, favoring their own group.
Social influence: When one person causes a change in attitude or behavior in another person, whether intentionally or unintentionally.
Social integration: The size of your social network, or number of social roles (e.g., son, sister, student, employee, team member).
Social Learning Theory: The theory that people can learn new responses and behaviors by observing the behavior of others.
Social models: Authorities that are the targets for observation and who model behaviors.
Social networks: Networks of social relationships among individuals through which information can travel.
Social psychology: The branch of psychological science that is mainly concerned with understanding how the presence of others affects our thoughts, feelings, and behaviors.
Social referencing: This refers to the process whereby individuals look for information from others to clarify a situation, and then use that information to act. Thus, individuals will often use the emotional expressions of others as a source of information to make decisions about their own behavior.
Social support: The perception or actuality that we have a social network that can help us in times of need and provide us with a variety of useful resources (e.g., advice, love, money).
Social value orientation (SVO): An assessment of how an individual prefers to allocate resources between him- or herself and another person.
Social zeitgeber: Zeitgeber is German for “time giver.” Social zeitgebers are environmental cues, such as meal times and interactions with other people, that entrain biological rhythms and thus sleep-wake cycle regularity.
Sociocultural theories: Theory founded in large part by Lev Vygotsky that emphasizes how other people and the attitudes, values, and beliefs of the surrounding culture influence children’s development.
Socioeconomic status (SES): A person’s economic and social position based on income, education, and occupation.
Sodium-potassium pump: An ion channel that uses the neuron’s energy (adenosine triphosphate, ATP) to pump three Na+ ions outside the cell in exchange for bringing two K+ ions inside the cell.
Soma: Cell body of a neuron that contains the nucleus and genetic information, and directs protein synthesis.
Somatic nervous system: A part of the peripheral nervous system that uses cranial and spinal nerves in volitional actions.
Somatogenesis: Developing from physical/bodily origins.
Somatosensation: Ability to sense touch, pain and temperature.
Somatosensory (body sensations) cortex: The region of the parietal lobe responsible for bodily sensations; the somatosensory cortex has a contralateral representation of the human body.
Somatotopic map: Organization of the primary somatosensory cortex maintaining a representation of the arrangement of the body.
Sound waves: Changes in air pressure. The physical stimulus for audition.
Spatial resolution: A term that refers to how small the elements of an image are; high spatial resolution means the device or technique can resolve very small elements; in neuroscience it describes how small of a structure in the brain can be imaged.
Spatial resolution: The degree to which one can separate a single object in space from another.
Specific vulnerabilities: How our experiences lead us to focus and channel our anxiety.
Spina bifida: A developmental disease of the spinal cord, where the neural tube does not close caudally.
Spines: Protrusions on the dendrite of a neuron that form synapses with terminal buttons of the presynaptic axon.
Split-brain patient: A patient who has had most or all of his or her corpus callosum severed.
Spontaneous recovery: Recovery of an extinguished response that occurs with the passage of time after extinction. Can occur after extinction in either classical or instrumental conditioning.
Standardize: Assessments that are given in the exact same manner to all people . With regards to intelligence tests standardized scores are individual scores that are computed to be referenced against normative scores for a population (see “norm”).
Standards: Ideas about how things should (or should not) be.
State of vulnerability: When a person places him or herself in a position in which he or she might be exploited or harmed. This is often done out of trust that others will not exploit the vulnerability.
Statistic: A numerical result computed from a sample (e.g., mean, proportion).
Statistical significance: A result is statistically significant if it is unlikely to arise by chance alone.
Stereotype Content Model: Stereotype Content Model shows that social groups are viewed according to their perceived warmth and competence.
Stereotype threat: The phenomenon in which people are concerned that they will conform to a stereotype or that their performance does conform to that stereotype, especially in instances in which the stereotype is brought to their conscious awareness.
Stereotypes: Our general beliefs about the traits or behaviors shared by group of people.
Stereotypes: Stereotype is a belief that characterizes people based merely on their group membership.
Stereotyping: A mental process of using information shortcuts about a group to effectively navigate social situations or make decisions.
Stigmatized group: A group that suffers from social disapproval based on some characteristic that sets them apart from the majority.
Stimulants: Stimulants: a class of drugs that speed up the body’s physiological and mental processes.
Stimulus control: When an operant behavior is controlled by a stimulus that precedes it.
Storage: The stage in the learning/memory process that bridges encoding and retrieval; the persistence of memory over time.
Strange situation: A laboratory task that involves briefly separating and reuniting infants and their primary caregivers as a way of studying individual differences in attachment behavior.
Stress: A pattern of physical and psychological responses in an organism after it perceives a threatening event that disturbs its homeostasis and taxes its abilities to cope with the event.
Stressor: An event or stimulus that induces feelings of stress.
Structuralism: A school of American psychology that sought to describe the elements of conscious experience.
Subcortical: Structures that lie beneath the cerebral cortex, but above the brain stem.
Subjective well-being: The name that scientists give to happiness—thinking and feeling that our lives are going very well.
Subjective well-being scales: Self-report surveys or questionnaires in which participants indicate their levels of subjective well-being, by responding to items with a number that indicates how well off they feel.
Subtle biases: Subtle biases are automatic, ambiguous, and ambivalent, but real in their consequences.
Suicidal ideation: Recurring thoughts about suicide, including considering or planning for suicide, or preoccupation with suicide.
Sulci: (plural) Grooves separating folds of the cortex.
Sulcus: (plural form, sulci) The crevices or fissures formed by convolutions in the brain.
Sulcus: A groove separating folds of the cortex.
Superadditive effect of multisensory integration: The finding that responses to multimodal stimuli are typically greater than the sum of the independent responses to each unimodal component if it were presented on its own.
Supernatural: Developing from origins beyond the visible observable universe.
Sympathetic nervous system: A division of the autonomic nervous system, that is faster than its counterpart that is the parasympathetic nervous system and works in opposition to it. Generally engaged in “fight or flight” functions.
Sympathetic nervous system (SNS): One of the two major divisions of the autonomic nervous system, responsible for stimulation of “fight or flight” activities.
Synapse: Junction between the presynaptic terminal button of one neuron and the dendrite, axon, or soma of another postsynaptic neuron.
Synapse: The tiny space separating neurons.
Synaptic gap: Also known as the synaptic cleft; the small space between the presynaptic terminal button and the postsynaptic dendritic spine, axon, or soma.
Synaptic vesicles: Groups of neurotransmitters packaged together and located within the terminal button.
Syndrome: Involving a particular group of signs and symptoms.
Synesthesia: The blending of two or more sensory experiences, or the automatic activation of a secondary (indirect) sensory experience due to certain aspects of the primary (direct) sensory stimulation.
Syntax: Rules by which words are strung together to form sentences.
Systematic observation: The careful observation of the natural world with the aim of better understanding it. Observations provide the basic data that allow scientists to track, tally, or otherwise organize information about the natural world.
Task-specific measures of self-efficacy: Measures that ask about self-efficacy beliefs for a particular task (e.g., athletic self-efficacy, academic self-efficacy).
Tastants: Chemicals transduced by taste receptor cells.
Taste aversion learning: The phenomenon in which a taste is paired with sickness, and this causes the organism to reject—and dislike—that taste in the future.
Taste receptor cells: Receptors that transduce gustatory information.
Temporal lobe: The part of the cerebrum in front of (anterior to) the occipital lobe and below the lateral fissure; involved in vision, auditory processing, memory, and integrating vision and audition.
Temporal lobe: An area of the cerebrum that lies below the lateral sulcus; it contains auditory and olfactory (smell) projection regions.
Temporal resolution: The degree to which one can separate a single point in time from another.
Temporal resolution: A term that refers to how small a unit of time can be measured; high temporal resolution means capable of resolving very small units of time; in neuroscience it describes how precisely in time a process can be measured in the brain.
Temporally graded retrograde amnesia: Inability to retrieve memories from just prior to the onset of amnesia with intact memory for more remote events.
Terminal button: The part of the end of the axon that form synapses with postsynaptic dendrite, axon, or soma.
Tertiary education: Education or training beyond secondary school, usually taking place in a college, university, or vocational training program.
Thalamus: A part of the diencephalon that works as a gateway for incoming and outgoing information.
Theories: Groups of closely related phenomena or observations.
Third-person perspective: Observations made by individuals in a way that can be independently confirmed by other individuals so as to lead to general, objective understanding. With respect to consciousness, third-person perspectives make use of behavioral and neural measures related to conscious experiences.
Thought-action fusion: The tendency to overestimate the relationship between a thought and an action, such that one mistakenly believes a “bad” thought is the equivalent of a “bad” action.
Threshold of excitation: Specific membrane potential that the neuron must reach to initiate an action potential.
Tip-of-the-tongue phenomenon: The inability to pull a word from memory even though there is the sensation that that word is available.
“Top-down” or internal causes of happiness: The person’s outlook and habitual response tendencies that influence their happiness—for example, their temperament or optimistic outlook on life.
Top-down processing: Experience influencing the perception of stimuli.
“Traitement moral” (moral treatment): A therapeutic regimen of improved nutrition, living conditions, and rewards for productive behavior that has been attributed to Philippe Pinel during the French Revolution, when he released mentally ill patients from their restraints and treated them with compassion and dignity rather than with contempt and denigration.
Trance States: Trance: a state of consciousness characterized by the experience of “out-of-body possession,” or an acute dissociation between one’s self and the current, physical environment surrounding them.
Transcranial direct current stimulation (tDCS): A neuroscience technique that passes mild electrical current directly through a brain area by placing small electrodes on the skull.
Transcranial magnetic stimulation (TMS): A neuroscience technique whereby a brief magnetic pulse is applied to the head that temporarily induces a weak electrical current that interferes with ongoing activity.
Transduction: The conversion of one form of energy into another.
Transduction: A process in which physical energy converts into neural energy.
Transfer-appropriate processing: A principle that states that memory performance is superior when a test taps the same cognitive processes as the original encoding activity.
Transverse plane: See “horizontal plane.”
Trephination: The drilling of a hole in the skull, presumably as a way of treating psychological disorders.
Trichromacy theory: Theory that proposes that all of your color perception is fundamentally based on the combination of three (not two, not four) different color signals.
Trichromatic theory: Theory proposing color vision as influenced by three different cones responding preferentially to red, green and blue.
Twin studies: A behavior genetic research method that involves comparison of the similarity of identical (monozygotic; MZ) and fraternal (dizygotic; DZ) twins.
Tympanic membrane: Thin, stretched membrane in the middle ear that vibrates in response to sound. Also called the eardrum.
Type A Behavior: Type A behavior is characterized by impatience, competitiveness, neuroticism, hostility, and anger.
Type B Behavior: Type B behavior reflects the absence of Type A characteristics and is represented by less competitive, aggressive, and hostile behavior patterns.
Type I error: In statistics, the error of rejecting the null hypothesis when it is true.
Type II error: In statistics, the error of failing to reject the null hypothesis when it is false.
Ultimatum game: An economic game in which a proposer (Player A) can offer a subset of resources to a responder (Player B), who can then either accept or reject the given proposal.
Unconditional positive regard: In person-centered therapy, an attitude of warmth, empathy and acceptance adopted by the therapist in order to foster feelings of inherent worth in the patient.
Unconditioned response (UR): In classical conditioning, an innate response that is elicited by a stimulus before (or in the absence of) conditioning.
Unconditioned stimulus (US): In classical conditioning, the stimulus that elicits the response before conditioning occurs.
Unconscious: Not conscious; the part of the mind that affects behavior though it is inaccessible to the conscious mind.
Universalism: Universalism proposes that there are single objective standards, independent of culture, in basic domains such as learning, reasoning, and emotion that are a part of all human experience.
Validity: Evidence related to the interpretation and use of test scores. A particularly important type of evidence is criterion validity, which involves the ability of a test to predict theoretically relevant outcomes. For example, a presumed measure of conscientiousness should be related to academic achievement (such as overall grade point average).
Value: Belief about the way things should be.
Ventral pathway: Pathway of visual processing. The “what” pathway.
Verbal persuasion: When trusted people (friends, family, experts) influence your self-efficacy for better or worse by either encouraging or discouraging you about your ability to succeed.
Vestibular system: Parts of the inner ear involved in balance.
Vestibulo-ocular reflex: Coordination of motion information with visual information that allows you to maintain your gaze on an object while you move.
Vicarious performances: When seeing other people succeed or fail leads to changes in self-efficacy.
Vicarious reinforcement: Learning that occurs by observing the reinforcement or punishment of another person.
Visual hemifield: The half of visual space (what we see) on one side of fixation (where we are looking); the left hemisphere is responsible for the right visual hemifield, and the right hemisphere is responsible for the left visual hemifield.
Voltage: The difference in electric charge between two points.
Weber’s law: States that just noticeable difference is proportional to the magnitude of the initial stimulus.
Wernicke’s area: A language area in the temporal lobe where linguistic information is comprehended (Also see Broca’s area).
What pathway: Pathway of neural processing in the brain that is responsible for your ability to recognize what is around you.
Where-and-How pathway: Pathway of neural processing in the brain that is responsible for you knowing where things are in the world and how to interact with them.
White coat hypertension: A phenomenon in which patients exhibit elevated blood pressure in the hospital or doctor’s office but not in their everyday lives.
White matter: The inner whitish regions of the cerebrum comprised of the myelinated axons of neurons in the cerebral cortex.
White matter: Regions of the nervous system that represent the axons of the nerve cells; whitish in color because of myelination of the nerve cells.
Working memory: Short transitory memory processed in the hippocampus.
Working memory: The ability to maintain information over a short period of time, such as 30 seconds or less.
Working memory: The form of memory we use to hold onto information temporarily, usually for the purposes of manipulation.