What does test-retest reliability measure?

Test-retest reliability specifically measures the consistency of scores from the same test administered on different occasions. This type of reliability is important in determining whether the test produces stable and reliable results over time. If a test is administered to the same group of participants at two different points in time, and the scores are similar, it indicates that the test has high test-retest reliability.

This reliability is essential for ensuring that the results of a test are not significantly affected by external factors or random variations that may occur between testing sessions. It demonstrates the test's ability to accurately measure a construct consistently, which is crucial in fields like therapeutic recreation where assessments inform interventions and program evaluations.

Other options, while related to the broader concept of reliability, do not capture the specific definition of test-retest reliability as it pertains to the repetition of the same test at different times, which distinguishes option C as the correct answer.