One way to establish validity of a questionnaire is my

Assignment Help Basic Statistics

One way to establish validity of a questionnaire is my measuring:

A) The correlation between the score on the questionnaire and another measure of the same concept

B) The alpha value of the reliability coefficient

C) How well sunjects perform on the questionnaire at one time compared to another time

D) The consistency by which multiple sunjects are able to complete the questionnaire without error

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