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I am conducting some analyses with a composite variable constructed by averaging 4 separate measures. I would like to know the reliability of the composite variable. Is Cronbach's alpha appropriate in this case (even though I have entire scale scores instead of item scores), or is a different measure more appropriate?

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  • $\begingroup$ Yes, you can use Cronbach's alpha for this. Bear in mind that it makes some assumptions, and is an estimate of the reliability. $\endgroup$
    – Jeremy Miles
    Commented Oct 23, 2018 at 21:38

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