Coefficient alpha is an expression of
A) the mean of split-half correlations between odd- and even-numbered items.
B) the mean of split-half correlations between first- and second-half items.
C) the mean of all possible split-half correlations.
D) the mean of the best or "alpha" level split-half correlations.

Question

Quizplus · Accepted Answer

Coefficient alpha, also known as Cronbach's alpha, is a measure of internal consistency or reliability of a test or scale. It is based on the average of all possible split-half correlations, corrected for the length of the scale. This means it considers every possible way to divide the items into two halves and calculates the reliability of each division, averaging these to get the overall reliability estimate.

Coefficient Alpha Is an Expression of