As a rule of thumb, a measure is considered sufficiently reliable if
A)it is valid.
B)there is no measurement error.
C)at least half of the total variance is true-score variance.
D)its correlation is 1.00.

Question

Quizplus · Accepted Answer

A measure is considered sufficiently reliable if at least half of the total variance is true-score variance. This is often operationalized as having a reliability coefficient (e.g., Cronbach's alpha) of 0.70 or higher, indicating that more than 50% of the variance in scores is due to true differences among individuals rather than measurement error.

As a Rule of Thumb, a Measure Is Considered Sufficiently