What Is Cronbach Alpha in Research

Cronbach’s alpha is a measure of internal consistency, that is, how closely related a set of items are as a group. It is considered to be a measure of scale reliability. A “high” value for alpha does not imply that the measure is unidimensional.

What is a good Cronbach alpha?

The general rule of thumb is that a Cronbach’s alpha of . 70 and above is good, . 80 and above is better, and . 90 and above is best.

Is Cronbach alpha 0.6 reliable?

Pallant (2001) states Alpha Cronbach’s value above 0.6 is considered high reliability and acceptable index (Nunnally and Bernstein, 1994). Whereas, the value of Alpha Cronbach is less than 0.6 considered low. Alpha Cronbach values in the range of 0.60 – 0.80 are considered moderate, but acceptable.