The value of Cronbach's alpha is based on an average of:
A)the values obtained for test-retest and reactivity scores.
B)all inter-item correlations coefficients and the number of items in the measure.
C)all items of the 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 of a test, and it is based on the inter-item correlation coefficients and the number of items in the measure. It assesses whether all items in a measure are measuring the same underlying construct, and it ranges from 0 to 1. A higher alpha value suggests greater internal consistency. Therefore, choice B is the correct answer.

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