Content validity and its principles

According to Patton (2002), content validity is determined by judgments on the appropriateness of the instrument’s content. Patton (2002) identifies three principles to improve content validity:

Use a broad sample of content rather than a narrow one.
Emphasize important material.
Write questions to measure the appropriate skill.

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Patton, M.Q. (2002). Qualitative research and evaluation methods. 3rd Ed. [Online]. Thousand Oaks, CA: Sage. Available from: https://books.google.co.in/books/about/Qualitative_Research_Evaluation_Methods.html?id=FjBw2oi8El4C.

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