reliability and validity

[Saba Farooqi]

how do we check the reliability and validity of primary data when using structured questions for data collection, where some answers are in the Likert scale, dichotomous and multiple answers??

[Maarten Buis]

That is a question that requires a book length answer, so I am just going to give you a link to a fairly brief and fairly accessible (but also fairly old) book: https://methods.sagepub.com/book/mon...assessment/toc