Cronbach’s Alpha

Internal Consistency

$\alpha \ge 0.9$

Excellent

$0.9>\alpha \ge 0.8$

Very Good

$0.8>\alpha \ge 0.7$

Good

$0.7>\alpha \ge 0.6$

Fair

$0.6>\alpha \ge 0.5$

Low

$0.5>\alpha$

Unacceptable