What is the term for the reliability measured when the same test is administered to the same group on two different occasions?

The term for the reliability measured when the same test is administered to the same group on two different occasions is known as Test-Retest Reliability. This type of reliability assesses the consistency of test scores over time. When a test is given to the same group of individuals at two separate points in time and the scores are compared, high correlation between the two sets of scores indicates that the test produces stable and reliable results. This approach is crucial for determining whether the traits or skills being measured remain constant over time, and it is particularly important in educational and psychological testing to ensure that the test can be trusted to yield similar outcomes under consistent conditions.

The other terms refer to different methods of evaluating reliability. Alternate Forms Reliability compares different versions of a test measuring the same construct, Split-Half Reliability involves dividing a test into two halves to see if the results are consistent, and Kuder-Richardson Reliability is a measure particularly used for tests that have multiple-choice items. Each of these methods assesses reliability in different ways but does not specifically pertain to re-administering the same test at different times.