How to measure the validity and reliability of test scale?

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Metin Ozdogan

It should be statistically representative. The more the samples, the more reliable the results.

H. Naderpour

Please read the following article:

https://courses.lumenlearning.com/suny-hccc-research-methods/chapter/chapter-7-scale-reliability-and-validity/

Thanks for the link.

Abdul Hadi

Metin Ozdogan and H. Naderpour thank you so much