Can Quasi-experimental study can be retrospective?

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David Eugene Booth

Well quasi experimental designs could be either prospective or retrospective. The problem is they don't use a probability sample so one can't really judge their results statistically. There are numerous references some are contained in the attachment. Best wishes, David Booth

Proloy Barua

I agree with Prof. David Eugene Booth . Here is a visual illustration link

https://upload.wikimedia.org/wikipedia/commons/1/14/ExplainingCaseControlSJW-en.svg

Win Htike

Thank you😊😊😊