The decision to use either the Kuder-Richardson 20 (KR 20)or the Kuder-Richardson 21 (KR 21)is based on whether:
A)the method used to determine reliability is the test-retest or the alternate form method.
B)correlation or regression is going to be used.
C)the items measure a homogeneous or heterogeneous behavior domain.
D)the item format is multiple-choice or true-false.

Question

The decision to use either the Kuder-Richardson 20 (KR 20)or the Kuder-Richardson 21 (KR 21)is based on whether: ​
A)the method used to determine reliability is the test-retest or the alternate form method.
B)correlation or regression is going to be used. ​
C)the items measure a homogeneous or heterogeneous behavior domain. ​
D)the item format is multiple-choice or true-false. ​

Quizplus · Accepted Answer

KR 20 and KR 21 are both measures of internal consistency reliability for tests with dichotomous items. KR 20 is used when the items measure a heterogeneous behavior domain, while KR 21 is used when the items measure a homogeneous behavior domain.

The Decision to Use Either the Kuder-Richardson 20 (KR 20)or