E
ear
n. The auditory sense organ which includes the exterior ear, or pinna, and a canal leading to the...
eardrum
n. A thin membrane which separates the ear canal from the middle ear and transforms variations in...
easy temperament
n. A type of temperament that is defined by a very regular, adaptable, mildly intense style of be...
eating disorders
n. The eating disorders are psychological disorders that center around issues of eating behavior ...
Ebbinghaus curve
n. A negatively accelerated curve of forgetting over time since learning, usually of nonsense syl...
echolalia
n. A speech pattern in which a person echoes what is said to him or her. It is an occasional symp...
eclectic approach
n. Any approach which does not adhere to one approach but includes diverse conceptual schemes or ...
eclectic psychotherapy
n. Any approach to psychotherapy which does not adhere to one approach but includes and blends di...
eclectic therapy
n. Any approach to therapy which does not adhere to one approach but includes and blends diverse ...
ecological fallacy
n. The inference that what is true of group members in general is true of a particular individual...
ecological-level analysis
n. An analysis conducted using group means for data which reduces the actual variability in the d...
ecological momentary assessment
► See DIARY METHODS
ecological niche
n. 1. The functional role of a species within a biological environment. 2. The geographical area ...
ecological psychology
n. The branch of psychology that attempts to understand mental and behavioral functioning within ...
ecological validity
n. 1. The accuracy with which research findings correspond to the world in general. The condition...
ecology
n. The study of biological environments using a system level analysis which seeks to understand t...
ecology, behavioral
n. The study of the interactions between an environment and the behavior of organisms within that...
ecosystem
n. Any environment and the interactions between the physical characteristics of the environment a...
ECT
n. Electroconvulsive therapy: the intentional induction of convulsions through sending low-voltag...
edge detector
n. 1. The name given to the set of neurons in the visual system which react maximally to low-spat...
educational mainstreaming
n. The practice of placing students who are markedly above or below average in academic performan...
educational psychology
n. The branch of applied psychology that studies the mental processes involved in formal educatio...
Edwards Personal Preference Schedule
n. A forced-choice self-report personality inventory in which takers are required to select which...
EEG
n. The EEG (or electroencephalogram) is the graph of an electrical signal produced by large group...
effect, empirical law of
n. The statement that rewarded behavior tends to be repeated. It is also called the weak law of e...
effect, law of
n. The statement that rewarded behavior tends to be repeated while behavior that is punished tend...
effector
n. 1. Any biological part or system such as a muscle or organ that produces a particular effect. ...
effect size
n. The magnitude of an experimental result usually expressed in standard deviation units. It diff...
efferent
adj. Of or relating to neurons whose impulses travel away from the brain or spinal cord toward th...
efferent nerves
n. Groups of neurons whose impulses travel away from the brain or spinal cord toward the rest of ...
efficacy
n. 1. The capacity to succeed at tasks. 2. A personal sense of power to deal with life's difficul...
ego
n. 1. The conscious sense of personal identity for many theorists, including Jung and Murray. Jun...
egocentric
adj. Being self-centered, preoccupied with one's own concerns to the exclusion of noticing or car...
egocentrism
n. 1. The state of being self-centered, preoccupied with one's own concerns to the exclusion of n...
ego development
n. A comprehensive theory of individual differences and human maturation proposed by Jane Loeving...
ego ideal
n. 1. In psychoanalysis the part of the superego which was the ideal self derived from parental i...
ego identity
n. 1. A comprehensive view of the self including one's place in the universe, cultural and social...
ego integrity
n. A recommitment to the order and meaning of one's life as it has been led, including all the fa...
ego integrity versus despair
n. The task in Erik Erikson's eighth stage of epigenetic development in which a person over the a...
ego involvement
n. 1. A state of having committed one's self to something. 2. The degree to which something is im...
egoistic suicide
n. Suicide that occurs when social integration within a society is high but the individual feels ...
ego strength
n. In psychoanalysis, the capacity of the ego to make and carry out plans without disruption from...
eidetic image
n. A mental image of a visual scene that is maintained in near entirety for long periods so that ...
eigenvalue
n. In statistics, a numeric index of the relative contribution of one independent variable to the...
elaborative rehearsal
n. A term that is used to identify a method of facilitating the transfer of information from brie...
Electra complex
n. In psychoanalysis, the process that girls go through in middle childhood in which they first b...
electrical brain stimulation
n. Application of very weak electrical current to localized areas of the brain. This has been use...
electric shock therapy
n. (ECT) The intentional induction of convulsions through sending low-voltage electrical current ...
electroconvulsive shock therapy
n. (ECT) The intentional induction of convulsions through sending low-voltage electrical current ...
electroencephalogram
n. (EEG) A graph made by recording the electrical current passing through different portions of t...
electroencephalography
n. The process of making graphs of the electrical current passing through different portions of t...
electromagnetic spectrum
n. The range of electromagnetic waves from the very short gamma rays to the very long waves used ...
electromyogram
n. (EMG) A graphic representation of the electrical activity of a muscle or group of muscles over...
elevated mood
n. An emotional tone characterized by positiveness, as in happiness, cheerfulness, wellbeing, ela...
elicit
v. To bring forth, as a stimulus of a particular kind brings forth a response of a particular kind.
embeddedness
n. A cultural value that refers to the degree to which individuals in a group value their ingroup...
emblem
n. 1. A gesture that takes the place of a verbal expression and is understood by most of the memb...
embryo
n. 1. A fertilized egg after the zygote has split up until it is born. 2. In humans, the stage of...
EMG
n. A graphic representation of the electrical activity of a muscles or group of muscles over time...
emic
1. adj. Of or relating to an approach to studying or understanding human functioning from within ...
emit
v. To send forth, as a decaying radioactive element may emit a particle of radiation or an organi...
emitted behavior
n. A spontaneous, voluntary behavior that occurs without external motivation; contrasted with eli...
emotion
n. A transient, neurophysiological response to a stimulus that excites a coordinated system of bo...
emotional intelligence
n. Emotional intelligence (EI) was formally defined by Peter Salovey and Jack Mayer in 1990 as a ...
emotional stability
n. The predictability and evenness of affect and the general absence of sharp or unpredictable va...
Emotional Stroop Test
n. An experimental procedure in which subjects are required to report the color in which words ar...
emotion, theory of
n. Any of a number of explanations for the phenomena of emotion, including but not limited to the...
emotive imagery
n. A technique used in behavioral therapy in which a subject first relaxes and then imagines emot...
empathy
n. 1. The capacity to understand the point of view of another person so that one vicariously shar...
empirical
adj. 1. Based on experience or observation rather than speculation, theory, or authority. 2. Indu...
empirical law
n. A summary principle or general statement of the relationship between variables based on observ...
empiricism
n. An approach to knowledge and understanding that supposes that all facts arise from experience ...
encephalitis
n. An inflammation of the brain usually caused by viral infection. External symptoms range from h...
encephalogram
n. An X-ray image of the brain often using air or dye to replace the cerebrospinal fluid so as to...
encephalon
n. The brain.
encoding
n. 1. A theoretical process in which sensory data are converted into a form in which the mind can...
encoding specificity
n. The idea that human memory performs best when the conditions of remembering are the same as th...
encopresis
n. A disorder of childhood in which the child repeatedly defecates in inappropriate places, wheth...
enculturation
n. The process of nonconscious learning and adopting the language, worldview, values, manners, sk...
endocrinology
n. The study of the anatomy, biochemistry, physiology, function, and pathology of the endocrine g...
endogenous
adj. Arising within the body as a result of normal processes.
endogenous depression
n. A state of mind characterized by negative mood, low energy, loss of interest in usual activiti...
endogenous opiate
n. Any substance produced by the body which has painkilling and euphoric effects similar to those...
endorphin
n. A family of substances produced in the brain which bind to the same receptors as do morphine a...
endorphins/enkephalins
n. Any substance produced by the body which has painkilling and euphoric effects similar to those...
end plate
n. A small circular region of muscle membrane that faces the terminus of a motor neuron and is re...
enuresis
n. Repeated involuntary urination in inappropriate places after the age at which voluntary bladde...
environmental psychology
n. The branch of psychology devoted to the study of the interactions between the physical aspects...
environmental stress
n. A prolonged state of psychological and physiological arousal leading to negative effects on mo...
enzyme
n. Any of a large number of proteins produced in the body that act as biological catalysts that s...
epidemiology
n. The study of the frequency and location of diseases and disorders. Such studies usually attemp...
epidermis
n. 1. The outer layer of skin of vertebrate animals, which contains some of the touch and pain re...
epigenesis
n. 1. The theory that the genetic or inherent characteristics of an organism interact with the en...
epilepsy
n. A family of chronic brain disorders characterized by uncontrolled electrical activity in the b...
epilepsy, major
n. A form of epilepsy involving seizures which are characterized by full body convulsions, loss o...
epilepsy, minor
n. A form of epilepsy in which there are no gross motor seizures. Sometimes there are momentary l...
epinephrine
n. Ahormone (C9H13NO3) and neurotransmitter created in the adrenal glands which acts primarily as...
epiphenomenon
n. A phenomenon that accompanies or is a by-product of a process that has no effect on the proces...
episodic memory
n. Any recollection of the experience of a specific event or occurrence. Theoretically, episodic ...
epistemic
adj. Of or relating to knowledge or the acquisition of knowledge.
epistemology
n. The branch of philosophy that is concerned with the origins, nature, limits, and methods of hu...
epoche
n. 1. A moment in which all belief is suspended, which is important for critical analysis in scie...
EQ
n. 1. The educational quotient or educational age divided by chronological age times 100. 2. The ...
equipotentiality
n. 1. The archaic theory that different areas of the cerebral cortex are equally involved in perf...
equity theory
n. A theory of social justice in which people consider as fair outcomes those in which they recei...
equivalence
n. A similarity of two or more things such that one may replace another without altering a situat...
erectile dysfunction/disorder
n. The persistent or recurrent inability to maintain an adequate penile erection for the completi...
ergonomics
n. The applied science of human motion and work which uses knowledge of physiology, biomechanics,...
Eriksonian developmental stages
n. The eight ages of man or epigenetic stages in the development of self described by Erik Erikso...
erogenous zone
n. Any portion of the body capable of arousing or increasing sexual excitement when stimulated. A...
error, measurement
n. The difference between a measurement and the true magnitude of the variable being measured, wh...
errors (types I and II)
n. In using inferential statistics error it is possible to make an error by rejecting the null hy...
error, sampling
n. 1. The variation in a measurement used to estimate a population parameter that is due to a sam...
error variance
n. The proportion of variance in a dependent variable that is independent of the independent vari...
escape-avoidance learning
n. A form of operant conditioning in which an organism learns to move away from an aversive stimu...
escape conditioning
n. A form of operant conditioning in which an organism learns to move away from an aversive stimu...
escape learning
n. A form of operant conditioning in which an organism learns to move away from an aversive stimu...
Escher figure
n. Any of numerous drawings by M. C. Escher or mimicking his style of drawing in which tricks of ...
ESP
n. Any capacity to know without using any of the five senses such as in clairvoyance, precognitio...
ESP cards
n. A set of 25 cards on the face of which is printed a circle, cross, square, star, or wavy lines...
eta squared
n. A calculation of the proportion of the variance accounted for by the relationship between inde...
Ethical Principles of Psychologists and Code of Conduct
n. A document adopted by the American Psychological Association delineating the professional code...
ethical treatment of animals
n. An area of ethics which deals with the care and treatment of animals especially in research se...
ethics
n. 1. The principles which define morally acceptable conduct, often within a particular group or ...
ethics of psychological research
n. The principles which define morally acceptable conduct within the field of psychological resea...
ethnic group
n. Any large social group that shares a common ethnic identity created by history, culture, and s...
ethnic identity
n. An individual person's belief in his or her being a part of one or more ethnic groups.
ethnicity
n. Ethnicity refers to an ethnic quality or affiliation with a particular group usually based on ...
ethnic minorities
n. Ethnic minorities are ethnic groups or members of ethnic groups in a given society who constit...
ethnocentrism
n. Ethnocentrism is the nearly universal tendency to view the world and to judge others primarily...
ethnography
n. 1. A holistic and systematic description of a society and its dynamics usually written by an a...
ethnopedagogy
n. The scientific study of folk methods of teaching children, including traditions, customs, sayi...
ethology
n. The scientific study of animal behavior in natural settings within an evolutionary framework. ...
ethos
n. The particular guiding beliefs, sentiments, values, morals, and spirit of a person, group, cul...
etic
1. adj. Of or relating to the application of an outside cultural perspective to the study and und...
etiology
n. The causes and course of development of a disease or disorder. Also spelled aetiology.
eugenics
n. A pseudoscientific social and political philosophy which seeks to eradicate genetic defects an...
euphoria
n. A state of elevated well-being and elation.
eustachian tube
n. A small tube extending from the middle ear to the pharynx which serves to equalize the air pre...
euthymia
n. A prolonged mood of well-being and tranquility.
event-related brain potential
n. (ERP) Neurons produce extremely small changes in their surrounding electrical fields as they a...
everyday cognition
n. An area of study that examines cognitive skills and abilities that are used in everyday functi...
evoked potential
n. (EP) An increase in electrical activity in a portion of the brain or other neural tissue broug...
evolution
n. 1. The process of gradual change over time of one thing or group into another thing or group m...
evolutionary psychology
n. Evolutionary psychologists propose that the human mind consists predominantly of highly specia...
evolutionary theory
n. Any theory which describes and accounts for the gradual change of one species into other speci...
excitatory conditioning
n. Another name for classical conditioning in which the pairing of an unconditioned stimulus (US)...
excitatory postsynaptic potential
n. A wave of depolarization in a dendrite which increases the likelihood of a neural impulse whic...
excitatory potential
n. A neural depolarization which changes the electrical configuration of a cell membrane, making ...
executive functions
n. Complex forms of cognition and behavior, including but limited to (1) controlling cognition (m...
exemplar theory
n. A theory that mental categorization uses remembered examples of a category with which new impr...
exhaustion stage
n. The final stage in the general adaptation syndrome (GAS), in which prolonged stress finally le...
exhibitionism
n. 1. A disorder characterized by intense sexual arousal by fantasies of or actual exposure of on...
existential anxiety
n. Anxiety is a feeling of nervousness, jitteriness, or dread that is generally a consequence of ...
existentialism
n. A philosophical and literary point of view which takes the phenomena of existence as its subje...
existential psychology
n. A general approach to psychology that employs an examination of the phenomena of experience as...
existential psychotherapy
n. Any of numerous therapies which focus on the immediate experience of the individual as the pro...
existential therapy
n. Any of numerous therapies which focus on the immediate experience of the individual as the pro...
exogenous
adj. Originating outside the person.
exogenous depression
n. A depression which occurs primarily as a reaction to a person's circumstances rather than prob...
expectancy
n. 1. The mental set of beliefs about the immediate future that predisposes an individual to perc...
expectancy effect
n. 1. The observer expectancy effect is the misperception of events in the direction of what is e...
expectancy theory
n. 1. In motivation, a theory that attitude is weighed by the value of a possible outcome multipl...
expectancy-value theory
n. Human beings have a natural tendency to react with some degree of positive or negative affect ...
Experiences in Close Relationship Scale
n. An online scale which measures two dimensions of adult attachment security versus insecurity w...
experiment
n. An arrangement of conditions and procedures which allows observations of the relationships bet...
experimental analysis of behavior
n. An approach to experimental psychology that adopts observable behavior and antecedent conditio...
experimental condition
n. One of two or more sets of controlled circumstances in which a dependent variable is measured ...
experimental control
n. The regulation of all extraneous variables in an experiment so that changes in the dependent v...
experimental design
n. A plan for the procedures to be followed in an experiment including all of the controls and me...
experimental error
n. A combination of random error and error introduced by faulty experimental design.
experimental extinction
n. 1. The gradual disappearance of a conditioned response when the conditioned stimulus is repeat...
experimental group
n. In an experiment, any group of subjects who receive the same set of experimental treatments, a...
experimental hypothesis
n. A specific prediction or explanation of the relationship between target phenomena that is base...
experimentally induced false memory
n. Inaccurate reports of recollection induced in subjects through various types of suggestion inc...
experimental manipulation
n. Any control by the experimenter of an independent variable across whose different conditions t...
experimental methods
n. A system of procedures and materials used systematically to investigate the relationships betw...
experimental neurosis
n. Anxious behavior and disorganized behavior brought about by subjecting an animal to punishment...
experimental psychology
n. The branch of psychology which uses controlled circumstances, often in a laboratory, to develo...
experimenter bias
n. Systematic errors by a researcher in observation, record keeping, interpretation, or computati...
experimenter effect
n. Bias entering into an experiment either through the experimenter's expectancies or other chara...
experimenter expectancy effect
n. Systematic errors by a researcher in observation, record keeping, interpretation, or computati...
expert system
n. A problem solving computer program which uses a database of information and a procedure for de...
explanatory style
n. 1. The individual style with which a person understands and explains events in general and his...
explicit memory
n. Aspects of memory that can be recalled at will from both episodic and semantic memory, as oppo...
explicit prejudice
n. Prejudice that is verbalized and thus made public.
exploratory behavior
n. In ethology, interactions with the world with no obvious goal other than its exploration.
exploratory data analysis
n. Analysis of data with the intent of discovering patterns for further investigation.
exploratory factor analysis
n. A set of analytic techniques applied to a correlation or covariance matrix seeking to discover...
exploratory research
n. Studies of a field which seek to discover interesting patterns and facts but without preformed...
explosive disorder
n. A disorder characterized by discrete episodes of impulsive aggressiveness which results in ser...
exposure therapy
n. A procedure in behavior therapy in which an individual is confronted with the thing he or she ...
expressive aphasia
n. Inability or seriously diminished capacity to speak, write, or use gestures to communicate, us...
expressive behavior
n. Any action of an organism which communicates information to another and particularly informati...
expressive language disorder
► See MOTOR APHASIA
expressivity
n. In genetics the degree to which a gene is likely to be expressed in the phenotype or actual bo...
external attribution
Definition. n. When trying to explain a person's behavior (what is referred to in psychology as m...
externalization
n. 1. In psychoanalysis a defense mechanism in which aspects of the unconscious are attributed to...
external locus of control
n. External locus of control refers to the degree to which individuals expect that a reinforcemen...
external rectus
n. The eye muscle on the outside midline of the eye that rotates the eye away from the nose. Also...
external validity
► See VALIDITY, EXTERNAL
exteroceptor
n. Any sensory receptor that takes in information from the external world as in the skin or mucus...
extinction
n. 1. The gradual disappearance of a conditioned response when the conditioned stimulus is repeat...
extinction, latent
n. 1. In operant conditioning, extinction that occurs in the absence of a response as in placing ...
extinction trial
n. An instance of presenting an organism with a stimulus previously paired with either an uncondi...
extinguish
v. To carry out an extinction procedure so that an established behavior disappears.
extracellular thirst
n. Thirst caused by a loss of extracellular liquid as through bleeding or vomiting. Also called h...
extraocular muscle
n. Any of the rectus or either of the oblique muscles which control rotation of the eye within it...
extrapyramidal
adj. Of or relating to the extrapyramidal nerve tract, which includes the motor cortex, basal gan...
extrapyramidal motor system
n. The neural system which controls voluntary motion, consisting of the motor cortex, basal gangl...
extrapyramidal syndrome
n. Symptoms arising as a result of injury to the extrapyramidal system or the effect of antipsych...
extrasensory perception
n. (ESP) Any capacity to know without using any of the five senses such as in clairvoyance, preco...
extrastriate cortex
n. Region of the occipital lobe beside the primary visual area (V1, striate cortex, located in th...
extreme response bias
n. The tendency to use the ends of a scale regardless of item content.
extrinsic eye muscle
n. The muscles that move the eye within its socket including the rectus and oblique muscles.
extrinsic motivation
n. A drive or desire to do something due to the effects that it will have rather than for the int...
extroversion
n. Extroversion/introversion (or extroversion), one of the dimensions of the five factor model, c...
extrovert
n. Extroverts (extraverts) are individuals who are high in terms of outward focus. Extroverts are...
eye dominance
n. A preference for using one eye over the other.
eye-movement desensitization and reprocessing
n. (EMDR) A therapeutic technique in which a person recalls traumatic events while concentrating ...
eye-voice span
n. In reading aloud the distance between the word being spoken and the word on which the eye is f...
eyewitness testimony
n. Eyewitness testimony is the information that an individual can provide about a crime. This inc...
Eysenck Personality Inventory
n. (EPI) A self-report personality test measuring introversion-extroversion and neu- roticism wri...
Eysenck Personality Questionnaire
n. (EPQ and EPQ-R) A self-report personality test measuring introversion-extroversion, neuroticis...