When would it be better (under what conditions) to use the non-equivalent groups design?
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It is better to use the non-equivalent group design when a researcher is trying to compare the effect of a given intervention or treatment, on research subjects or groups that have similar characteristics. This would be especially important and helpful in situations in which a researcher trying to ascertain as to whether or not a specific kind of intervention or ...
This solution describes when it is most feasible to utilize the non-equivalent groups design in research.