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Professor Myth asked respondents whether or not they had ever been divorced. One year later Professor Myth asked respondents the same question. Myth found that with repeated applications of the measure different responses were obtained for the same subject. This means that the measuring instrument was ___ .
(A) unreliable.
(B) invalid.
(C) unreliable or the value on the variable had changed.
(D) lacking in face validity.
(E) a and b only are correct.

Respuesta :

Answer: the correct answer is (C) unreliable or the value on the variable had changed.

Explanation:

When the respondents change their answers on the same issue, the information that a researcher can obtain is unreliable or maybe something has changed in either the survey or research questionaire or in the same study group.

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