I'm about to use an existing and validated questionnaire, I will not modify anything, just use it as it is. do I have to re-validate the questionnaire? if yes, I need references support that for citation. i did search but I couldn't find the answer.
the questionnaire which I will use is already validated by the original researcher.
Every thing on the Earth is in a continuous variation (dynamics), hence, my answer is YES.
Good luck my colleague.
Emad
If the Questionnaire is reliable and valid, it does not require re-validation.
Also consider whether the questionnaire can be improved in quality by re-validation or bring about any change in the expected result if it is re-validated,
If not, then there is no point in re-validation of an already validated questionnaire.
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