JAMES, WILLIAM (1842-1910)

James, probably America’s most influential psychologist, was born of an eminent family in New York City and studied in Switzerland and Germany. On his...

JANET, PIERRE MARIE FELIX (1859-1947)

Janet, one of the first systematic students of neurosis, was bom and raised in Paris, and studied at the University of Paris. There he...

JARGONAPHASIA

Unintelligible speech in which correct words are intermingled with words that are completely out of context; the use of words that have no relation...

JOINT COMMISSION ON MENTAL ILLNESS AND HEALTH

In 1955, Congress passed the Mental Health Study Act, which directed the Joint Commission on Mental Illness and Health to determine the mental health...

JUNG, CARL GUSTAV (1875-1961)

Born in Kesswil, Switzerland, Jung came from a long line of physicians and theologians. Before concentrating on the study of medicine at the University...

JUST NOTICEABLE DIFFERENCE (JND; Differential or Difference Threshold)

The smallest difference between two stimuli that can be reliably detected.The external world comes to us in the form of ever-changing sensations, and we...

JUVENILE PARESIS

A brain disorder caused by congenital syphilis.In the juvenile form of paresis the spirochete infection is transmitted from mother to fetus after the fifth...

JACKKNIFE

a procedure of taking repeated subsamples from a data source. This procedure empowers the estimating of standard errors and confidence intervals.

JET LAG

a maladjustment of circadian rhythms, which requires several days for adjusting rest, work, eating, body temperature and adrenocortical secretion cycles to local time.

JOB EVALUATION

Methods of job analysis for determining the pay structure in an organization. These evaluation methods comprise of ranking jobs on the basis of a...

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