Which of the following is generally the preferred statistic for obtaining a measure of internal-consistency reliability?
A) KR-20
B) KR-21
C) Kendall's Tau
D) coefficient alpha

Question

Quizplus · Accepted Answer

Coefficient alpha, also known as Cronbach's alpha, is the most commonly used statistic for obtaining a measure of internal-consistency reliability. It is a measure of the reliability of a scale or test, indicating the extent to which the items on the scale or test are measuring the same construct or dimension. KR-20 and KR-21 are alternative methods for calculating internal-consistency reliability, but they are less commonly used and have more specific assumptions about the homogeneity of the items. Kendall's Tau is a measure of rank correlation rather than internal-consistency reliability.

Which of the Following Is Generally the Preferred Statistic for Obtaining