An estimate of test-retest reliability is often referred to as a coefficient of stability when the time interval between the test and retest is more than
A) 30 days.
B) 60 days.
C) 3 months.
D) 6 months.

Question

Quizplus · Accepted Answer

The best choice is D as a time interval of more than 6 months is generally required for a coefficient of stability estimate. This time period allows for possible changes in the construct being measured and reduces the likelihood of participants simply remembering their previous responses. Options A, B, and C are too short of time intervals for stable estimates of reliability.

An Estimate of Test-Retest Reliability Is Often Referred to as a Coefficient