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Psychology Glossary
A comprehensive review of psychology terms.
125
Psychology
Graduate
02/24/2011

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Term
A-B-A design
Definition
Experimental design in which participants first experience the baseline condition (A), then experience the experimental treatment (B), and then return to the baseline (A)
Term
abnormal psychology
Definition
The area of psychological investigation concerned with understanding the nature of individual pathologies of mind, mood, and behavior
Term
absolute threshold
Definition
The minimum amount of physical energy needed to produce a reliable sensory experience; operationally defined as the stimulus level at which a sensory signal is detected half the time
Term
accommodation
Definition
The process by which the ciliary muscles change the thickness of the lens of the eye to permit variable focusing on near and distant objects

or

According to Piaget, the process of restructuring or modifying cognitive structures so that new information can fit into them more easily; this process works in tandem with assimilation
Term
acquisition
Definition
The stage in a classical conditioning experiment during which the conditioned response is first elicited by the conditioned stimulus
Term
action potential
Definition
The nerve impulse activated in a neuron that travels down the axon and causes neurotransmitters to be released into a synapse
Term
acute stress
Definition
A transient state of arousal with typically clear onset and offset patterns.
Term
addiction
Definition
A condition in which the body requires a drug in order to function without physical and psychological reactions to its absence; often the outcome of tolerance and dependence.
Term
ageism
Definition
Prejudice against older people, similar to racism and sexism in its negative stereotypes.
Term
aggression
Definition
Behaviors that cause psychological or physical harm to another individual.
Term
agoraphobia
Definition
An extreme fear of being in public places or open spaces from which escape may be difficult or embarrassing.
Term
AIDS
Definition
Acronym for acquired immune deficiency syndrome, a syndrome caused by a virus that damages the immune system and weakens the body's ability to fight infection.
Term
algorithm
Definition
A step-by-step procedure that always provides the right answer for a particular type of problem.
Term
all-or-none law
Definition
The rule that the size of the action potential is unaffected by increases in the intensity of stimulation beyond the threshold level.
Term
altruism
Definition
Prosocial behaviors a person carries out without considering his or her own safety or interests.
Term
Alzheimer's disease
Definition
A chronic organic brain syndrome characterized by gradual loss of memory, decline in intellectual ability, and deterioration of personality.
Term
amacrine cells
Definition
Cells that integrate information across the retina; rather than sending signals toward the brain, amacrine cells link bipolar cells to other bipolar cells and ganglion cells to other ganglion cells.
Term
ambiguity
Definition
A perceptual object that may have more than one interpretation.
Term
amnesia
Definition
A failure of memory caused by physical injury, disease, drug use, or psychological trauma.
Term
amygdala
Definition
The part of the limbic system that controls emotion, aggression, and the formation of emotional memory.
Term
analytic psychotherapy
Definition
A branch of psychology that views the person as a constellation of compensatory internal forces in a dynamic balance.
Term
anchoring heuristic
Definition
An insufficient adjustment up or down from an original starting value when judging the probable value of some event or outcome.
Term
animal cognition
Definition
The cognitive capabilities of nonhuman animals; researchers trace the development of cognitive capabilities across species and the continuity of capabilities from nonhuman to human animals.
Term
anorexia nervosa
Definition
eating disorder in which an individual weighs less than 85 percent of her or his expected weight but still controls eating because of a self-perception of obesity.
Term
anticipatory coping
Definition
Efforts made in advance of a potentially stressful event to overcome, reduce, or tolerate the imbalance between perceived demands and available resources.
Term
anxiety
Definition
An intense emotional response caused by the preconscious recognition that a repressed conflict is about to emerge into consciousness.
Term
anxiety disorders
Definition
Mental disorders marked by physiological arousal, feelings of tension, and intense apprehension without apparent reason.
Term
apparent motion
Definition
A movement illusion in which one or more stationary lights going on and off in succession are perceived as a single moving light; the simplest form of apparent motion is the phi phenomenon.
Term
archetype
Definition
A universal, inherited, primitive, and symbolic representation of a particular experience or object.
Term
assimilation
Definition
According to Piaget, the process whereby new cognitive elements are fitted in with old elements or modified to fit more easily; this process works in tandem with accommodation.
Term
association cortex
Definition
The parts of the cerebral cortex in which many high-level brain processes occur.
Term
attachment
Definition
Emotional relationship between a child and their regular caregiver.
Term
attention
Definition
state of focused awareness on a subset of the available perceptual information.
Term
attitude
Definition
The learned, relatively stable tendency to respond to people, concepts, and events in an evaluative way.
Term
attribution theory
Definition
social-cognitive approach to describing the ways the social perceiver uses information to generate causal explanations.
Term
attribution
Definition
Judgments about the causes of outcomes.
Term
audience design
Definition
The process of shaping a message depending on the audience for which it is intended.
Term
auditory cortex
Definition
The area of the temporal lobes that receives and processes auditory information.
Term
auditory nerve
Definition
The nerve that carries impulses from the cochlea to the cochlear nucleus of the brain.
Term
automatic processes
Definition
Processes that do not require attention; they can often be performed along with other tasks without interference.
Term
autonomic nervous system (ANS)
Definition
The subdivision of the peripheral nervous system that controls the body's involuntary motor responses by connecting the sensory receptors to the central nervous system (CNS) and the CNS to the smooth muscle, cardiac muscle, and glands.
Term
availability heuristic
Definition
A judgment based on the information readily available in memory.
Term
aversion therapy
Definition
A type of behavioral therapy used to treat individuals attracted to harmful stimuli; an attractive stimulus is paired with a noxious stimulus in order to elicit a negative reaction to the target stimulus.
Term
axon
Definition
The extended fiber of a neuron through which nerve impulses travel from the soma to the terminal buttons.
Term
basic level
Definition
The level of categorization that can be retrieved from memory most quickly and used most efficiently.
Term
basilar membrane
Definition
A membrane in the cochlea that, when set into motion, stimulates hair cells that produce the neural effects of auditory stimulation.
Term
behavior
Definition
The actions by which an organism adjusts to its environment.
Term
behavior analysis
Definition
The area of psychology that focuses on the environmental determinants of learning and behavior.
Term
behavior modification or behavior therapy
Definition
The systematic use of principles of learning to increase the frequency of desired behaviors and/or decrease the frequency of problem behaviors.
Term
behavioral confirmation
Definition
The process by which people behave in ways that elicit from others specific expected reactions and then use those reactions to confirm their beliefs.
Term
behavioral data
Definition
Observational reports about the behavior of organisms and the conditions under which the behavior occurs or changes.
Term
behavioral measures
Definition
Overt actions and reactions that are observed and recorded, exclusive of self-reported behavior.
Term
behavioral rehearsal
Definition
Procedures used to establish and strengthen basic skills; as used in social-skills training programs, requires the client to rehearse a desirable behavior sequence mentally.
Term
behaviorism
Definition
A scientific approach that limits the study of psychology to measurable or observable behavior.
Term
behaviorist perspective
Definition
The psychological perspective primarily concerned with observable behavior that can be objectively recorded and with the relationships of observable behavior to environmental stimuli.
Term
belief-bias effect
Definition
A situation that occurs when a person's prior knowledge, attitudes, or values distort the reasoning process by influencing the person to accept invalid arguments.
Term
between-subjects design
Definition
A research design in which different groups of participants are randomly assigned to experimental conditions or to control conditions.
Term
biofeedback
Definition
A self-regulatory technique by which an individual acquires voluntary control over nonconscious biological processes.
Term
biological constraints on learning
Definition
Any limitations on an organism's capacity to learn that are caused by the inherited sensory, response, or cognitive capabilities of members of a given species.
Term
biological perspective
Definition
The approach to identifying causes of behavior that focuses on the functioning of the genes, the brain, the nervous system, and the endocrine system.
Term
biomedical therapies
Definition
Treatments for psychological disorders that alter brain functioning with chemical or physical interventions such as drug therapy, surgery, or electroconvulsive therapy.
Term
bio-psychological model
Definition
A model of health and illness that suggests that links among the nervous system, the immune system, behavioral styles, cognitive processing, and environmental factors can put people at risk for illness.
Term
bipolar cells
Definition
Nerve cells in the visual system that combine impulses from many receptors and transmit the results to ganglion cells.
Term
bipolar disorder
Definition
A mood disorder characterized by alternating periods of depression and mania.
Term
blocking
Definition
A phenomenon in which an organism does not learn a new stimulus that signals an unconditioned stimulus, because the new stimulus is presented simultaneously with a stimulus that is already effective as a signal.
Term
body image
Definition
The subjective experience of the appearance of one's body.
Term
bottom-up processing
Definition
Perceptual analyses based on the sensory data available in the environment; results of analyses are passed upward toward more abstract representations.
Term
brain stem
Definition
The brain structure that regulates the body's basic life processes.
Term
brightness
Definition
The dimension of color space that captures the intensity of light.
Term
Broca's area
Definition
The region of the brain that translates thoughts into speech or sign.
Term
Bulimia nervosa
Definition
An eating disorder characterized by binge eating followed by measures to purge the body of the excess calories.
Term
bystander intervention
Definition
Willingness to assist a person in need of help.
Term
Cannon-Bard theory of emotion
Definition
A theory stating that an "emotional stimulus produces two co-occurring reactions-arousal "and experience of emotion-that do not cause each other.
Term
case study
Definition
Intensive observation of a particular individual or small group of individuals.
Term
catharsis
Definition
The process of expressing strongly felt but usually repressed emotions.
Term
central nervous system (CNS)
Definition
The part of the nervous system consisting of the brain and spinal cord.
Term
centration
Definition
A thought pattern common during the beginning of the preoperational stage of cognitive development; characterized by the child's inability to take more than one perceptual factor into account at the same time.
Term
cerebellum
Definition
The region of the brain attached to the brain stem that controls motor coordination, posture, and balance as well as the ability to learn control of body movements.
Term
cerebral cortex
Definition
The outer surface of the cerebrum.
Term
cerebral hemispheres
Definition
The two halves of the cerebrum, connected by the corpus callosum.
Term
cerebrum
Definition
The region of the brain that regulates higher cognitive and emotional functions.
Term
child-directed speech
Definition
A special form of speech with an exaggerated and high-pitched intonation that adults use to speak to infants and young children.
Term
chronic stress
Definition
A continuous state of arousal in which an individual perceives demands as greater than the inner and outer resources available for dealing with them.
Term
chronological age
Definition
The number of months or years since an individual's birth.
Term
chunking
Definition
The process of taking single items of information and recoding them on the basis of similarity or some other organizing principle.
Term
circadian rhythm
Definition
A consistent pattern of cyclical body activities, usually lasting 24 to 25 hours and determined by an internal biological clock.
Term
classical conditioning
Definition
A type of learning in which a behavior (conditioned response) comes to be elicited by a stimulus (conditioned stimulus) that has acquired its power through an association with a biologically significant stimulus (unconditioned stimulus).
Term
client
Definition
The term used by clinicians who think of psychological disorders as problems in living, and not as mental illnesses, to describe those being treated.
Term
client-centered therapy
Definition
A humanistic approach to treatment that emphasizes the healthy psychological growth of the individual; based on the assumption that all people share the basic tendency of human nature toward self-actualization.
Term
clinical ecology
Definition
A field of psychology that relates disorders such as anxiety and depression to environmental irritants and sources of trauma.
Term
clinical psychologist
Definition
An individual who has earned a doctorate in psychology and whose training is in the assessment and treatment of psychological problems.
Term
clinical social worker
Definition
A mental health professional whose specialized training prepares him or her to consider the social context of people's problems.
Term
closure
Definition
A perceptual organizing process that leads individuals to see incomplete figures as complete.
Term
cochlea
Definition
primary organ of hearing; a fluid-filled coiled tube located in the inner ear.
Term
cognition
Definition
Processes of knowing, including attending, remembering, and reasoning; also the content of the processes, such as concepts and memories.
Term
cognitive appraisal
Definition
With respect to emotions, the process through which physiological arousal is interpreted with respect to circumstances in the particular setting in which it is being experienced; also, the recognition and evaluation of a stressor to assess the demand, the size of the threat, the resources available for dealing with it, and appropriate coping strategies.
Term
cognitive appraisal theory of emotion
Definition
A theory stating that the experience of emotion is the joint effect of physiological arousal and cognitive appraisal, which serves to determine how an ambiguous inner state of arousal will be labeled.
Term
cognitive behavior modification
Definition
A therapeutic approach that combines the cognitive emphasis on the role of thoughts and attitudes influencing motivations and response with the behavioral emphasis on changing performance through modification of reinforcement contingencies.
Term
cognitive development
Definition
The development of processes of knowing, including imagining, perceiving, reasoning, and problem solving.
Term
cognitive dissonance
Definition
The theory that the tension-producing effects of incongruous cognitions motivate individuals to reduce such tension.
Term
cognitive map
Definition
A mental representation of physical space.
Term
cognitive perspective
Definition
The perspective on psychology that stresses human thought and the processes of knowing, such as attending, thinking, remembering, expecting, solving problems, fantasizing, and consciousness.
Term
cognitive processes
Definition
Higher mental processes, such as perception, memory, language, problem solving, and abstract thinking.
Term
cognitive psychology
Definition
The study of higher mental processes such as attention, language use, memory, perception, problem solving, and thinking.
Term
cognitive science
Definition
The interdisciplinary field of study of the approach systems and processes that manipulate information.
Term
cognitive therapy
Definition
A type of psychotherapeutic treatment that attempts to change feelings and behaviors by changing the way a client thinks about or perceives significant life experiences.
Term
collective unconscious
Definition
The part of an individual's unconscious that is inherited, evolutionarily developed, and common to all members of the species.
Term
comorbiditiy
Definition
The experience of more than one disorder at the same time.
Term
complementary colors
Definition
Colors opposite each other on the color circle; when additively mixed, they create the sensation of white light.
Term
compliance
Definition
A change in behavior consistent with a communication source's direct requests.
Term
concepts
Definition
Mental representations of kinds or categories of items or ideas.
Term
conditioned reinforcers
Definition
In classical conditioning, formerly neutral stimuli that have become reinforcers.
Term
conditioned response
Definition
In classical conditioning, a response elicited by some previously neutral stimulus that occurs as a result of pairing the neutral stimulus with an unconditioned stimulus.
Term
conditioned stimulus
Definition
In classical conditioning, a previously neutral stimulus that comes to elicit a conditioned response.
Term
conditioning
Definition
The ways in which events, stimuli, and behavior become associated with one another.
Term
cones
Definition
Photoreceptors concentrated in the center of the retina that are responsible for visual experience under normal viewing conditions and for all experiences of color.
Term
conformity
Definition
The tendency for people to adopt the behaviors, attitudes, and values of other members of a reference group.
Term
confounding variable
Definition
A stimulus other than the variable an experimenter explicitly introduces into a research setting that affects a participant's behavior.
Term
consciousness
Definition
A state of awareness of internal events and of the external environment.
Term
consensual validation
Definition
The mutual affirmation of conscious views of reality.
Term
conservation
Definition
According to Piaget, the understanding that physical properties do not change when nothing is added or taken away, even though appearances may change.
Term
consistency paradox
Definition
The observation that personality ratings across time and among different observers are consistent, while behavior ratings across situations are not consistent.
Term
contact comfort
Definition
Comfort derived from an infant's physical contact with the mother or caregiver.
Term
contact hypothesis
Definition
The idea that direct contact between hostile groups alone will reduce prejudice.
Term
context of discovery
Definition
The initial phase of research, in which observations, beliefs, information, and general knowledge lead to a new idea or a different way of thinking about some phenomenon.
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