TestRetestReliabilität
Test-retest reliability is a measure of the consistency of results from a test administered to the same individuals on two or more occasions under similar conditions. It assesses the extent to which a test yields the same scores when repeated, assuming that the trait or characteristic being measured has not changed significantly between administrations. This type of reliability is particularly important for instruments designed to measure stable attributes, such as personality traits or cognitive abilities.
To determine test-retest reliability, a group of participants completes a test, and then after a suitable interval,
Low test-retest reliability can arise from various sources, including fluctuations in the individual's state (e.g., fatigue,