Let’s say you want to find out how well students’ think they learned theory in your class.
One option is to do a pre/post test: You distribute the same survey before and after the class asking them to rate on 1-4 scale how well they think they know the new material. Then you compare their ratings.
Another option is to do posttest only: You could give them a survey after the class that asks them to rate 1-4 their knowledge before the class and 1-4 their knowledge now. Then you compare their ratings.
One research option is stronger than the other. Which one is it? and Why? (hint: think retrospective/prospective)