Cronbach's coefficient alpha is preferred to the Kuder-Richardson 21 when
A) the items are all of the same level of difficulty.
B) the items are scored right or wrong (dichotomously).
C) the responses may receive a varying number of points.
D) a and c

Question

Quizplus · Accepted Answer

Cronbach's coefficient alpha is preferred when the responses to items may receive a varying number of points, indicating it is used for tests with items that are not merely scored as right or wrong but can have a range of scores, unlike the Kuder-Richardson 21 formula which is specifically designed for dichotomous choices.

Cronbach's Coefficient Alpha Is Preferred to the Kuder-Richardson 21 When