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kainic acid

n. A neurotoxic amino acid found in some species of red algae and the seaweed Digenea simplex, wh...

kakosmia

n. The hallucination of an unpleasant smell such as feces or something similarly repulsive. Also ...

Kallikak

n. The pseudonym for a family used as an example of the hereditary transmission of feeblemindedne...

Kanner's syndrome

n. A disorder of childhood characterized by impaired social learning and communication, restricte...

kappa statistic

n. A numerical index of agreement between two raters classifying the same items, which ranges bet...

karyotype

1. n. A systematic array of the chromosomes of a single cell, including their number, structural ...

Kaspar Hauser experiment

n. An experiment in which an animal is reared in isolation from other members of its species in o...

katasexualism

n. A sexual preference for dead people or people with characteristics like animals' or enjoyment ...

K complex

n. A pattern of scalp electrophysiology recorded by an electroencephalograph with brief, high-amp...

Kendall coefficient of concordance

n. (W) An index of the degree to which rankings by several independentjudges agree with each other.

Kendall correlation coefficient

► See KENDALL'S TAU

Kendall's tau

n. A measure of association between two pairs of rankings such that no association = 0 and perfec...

kinesics

n. The study of facial expressions, nonverbal aspects of voice, gestures, gaze, visual attention,...

kinetic depth effect

n. A visual phenomenon in which a moving shadow of a three-dimensional figure appears to move for...

kin selection

n. A form of natural selection whereby altruism shown by individuals toward closely related indiv...

kinship

n. Relatedness which may be by birth, genetics, marriage, or adoption, which varies considerably ...

kinship term

n. Any word which denotes relatedness in extended families. Languages and cultures vary considera...

kleptomania

n. A psychological disorder characterized by compulsive stealing in which the person feels a pres...

Klinefelter's syndrome

n. A genetic disorder of males characterized by the presence of an extra X, or female sex, chromo...

Kluver-Bucy syndrome

n. A disorder caused by damage to both medial temporal lobes in which there are increased and ind...

knee-jerk reflex

n. A reflexive action in which the leg jerks up when the flexed knee is tapped just below the kne...

knowledge

n. Any internal information, understanding, or capacity to accomplish tasks which has been learne...

knowledge, declarative

n. Any learned information about the world which can be stated overtly such as "The sky is blue" ...

knowledge, procedural

n. Any learned ability to do something such as ride a bicycle or reach out and pick something up ...

Kolmogorov-Smirnov test

n. A nonparametric test of the degree of fit between a sample and a theoretical population or a t...

koro

n. A mental disorder found only in some Southeast Asian and south Chinese cultures, which is char...

Korsakoff's psychosis

n. Korsakoff's psychosis is an organic disorder believed to be a subdivision of Wernicke- Korsako...

Korsakoff's syndrome - a subdivision of Wernicke-Korsakoff syndrome

n. Korsakoff's syndrome is characterized by a significant retrograde memory deficit in individual...

Korte's laws

n. A description of the parameters affecting the illusion of apparent motion, including illuminat...

K-R formulas

n. A series of statistical formulas developed by G. W. Kuder and M. W. Richardson concerning test...

Kruskal-Wallis test

n. A nonparametric test of whether three or more samples are drawn from the same population.

Kuder Preference Record

n. An occupational interest survey developed in 1939 which measured relative interest in 10 occup...

Kuder-Richardson coefficient

n. This is Kuder-Richardson formula 20, which is a widely used measure of internal consistency of...

kurtosis

n. A measure of the degree to which a probability distribution peaks around its mean. A distribut...

kuru

n. A fatal prion disease of the central nervous system whose symptoms include ataxia, difficulty ...

kymograph

n. 1. An instrument for recording changes in psychological or physiological variables by means of...