Hello, I found a survey about attitude toward language in an article which I find fit to use it in my thesis.

The survey has 30 questions, which were put into 5 factors through factor analysis with varimax solution and were calculated the internal consistency estimate of reliability for each factor.

Items with a minimum eigenvalue of 1.0 and that loaded on a factor at a level of .45 and above were kept; items that loaded on multiple factors at .32 or higher or with little theoretical connections to the factor were deleted

The problem is if I want to use this survey, is there anything I can do to validate or make sure it is reliable. I can only think of giving it a pilot test and calculate cronbach's alpha for each item.

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