Many assumptions must be met when using KR-21 to estimate reliability.Which is NOT such an assumption?
A) Items should be dichotomous.
B) Items should be of equal difficulty.
C) Items should be homogeneous.
D) Items should be scorable by computer.

Question

Quizplus · Accepted Answer

The assumption that items should be scorable by computer is not necessary when using KR-21. KR-21 can be computed manually with paper and pencil. The other assumptions listed (items should be dichotomous, of equal difficulty, and homogeneous) are necessary for the validity and accuracy of KR-21.

Many Assumptions Must Be Met When Using KR-21 to Estimate