The most widely used measure of reliability is:
A) the split-half correlation, in which the odd and even numbered items of a measure are correlated to assess internal consistency.
B) coefficient alpha, the average of all possible split-half correlations.
C) the test-retest reliability.
D) criterion-related reliability.

Question

Quizplus · Accepted Answer

Coefficient alpha is considered the most widely used measure of reliability because it provides an estimate of the internal consistency reliability of a measure by accounting for the correlations between all items. It is a more accurate and reliable measure compared to split-half correlations, which only account for half of the items at a time. Test-retest reliability and criterion-related reliability are also important measures of reliability, but are not considered as widely used as coefficient alpha.

The Most Widely Used Measure of Reliability Is