Which of the following is true of test-retest reliability?
A) r is established during the study
B) An investigator should always collect test-retest data during a study
C) As the length of time increases between test administrations, r decreases
D) b and c
E) All of the above

Question

Quizplus · Accepted Answer

Test-retest reliability refers to the consistency of a measure over time. The statement that as the length of time increases between test administrations, the correlation coefficient (r) decreases, is generally true because external factors and participant changes can affect the consistency of the results.

Which of the Following Is True of Test-Retest Reliability