Reliability analysis/ Cronbach's Alpha/ pilot test using IBM SPSS

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What does Cronbach's alpha tell us?
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. ... As the average inter-item correlation increases, Cronbach's alpha increases as well (holding the number of items constant)

What is the acceptable Cronbach alpha value?
Numerical values of alpha

There are different reports about the acceptable values of alpha, ranging from 0.70 to 0.95. A low value of alpha could be due to a low number of questions, poor inter-relatedness between items or heterogeneous constructs..



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