test-retest reliability


test-re·test re·li·a·bil·i·ty

in psychology, the consistency of measurement based on the correlation between test and retest scores for the same subject.
See also: coefficient, reliability.

test-retest reliability

Psychology A measure of the ability of a psychologic testing instrument to yield the same result for a single Pt at 2 different test periods, which are closely spaced so that any variation detected reflects reliability of the instrument rather than changes in the Pt's status. Cf Interrater reliability Stastistics The correlation between the 1st and 2nd test of a number of subjects. See Reliability.

test-retest reliability

The ability of a test to produce consistent results when it is used multiple times under nearly equivalent conditions. A test whose results fluctuate minimally when it is reused is said to have good test-retest reliability. See also: reliability