The value of Cronbach's alpha is based on an average of
A) the values obtained for test-retest and split half correlations.
B) all inter-item correlations coefficients and the number of items in the measure.
C) the scores from tests given to different individuals.
D) the correlation between scores on a shortened version and a longer version of the measure.

Question

Quizplus · Accepted Answer

Cronbach's alpha is a measure of internal consistency reliability. It is based on the inter-item correlations between all pairs of items in the measure and the number of items. Therefore, the correct choice is B - all inter-item correlation coefficients and the number of items in the measure.

The Value of Cronbach's Alpha Is Based on an Average