Hello, I'm retaking this course (university) not because fail the first time but because I didn't get the grade I wanted. My teacher is not of no help but almost.

This is an example of what I'm working on, this is not the real thing.

I'm trying to make an example (like a fictive study) around psychology but I'm having trouble determinating if my study is experimental or not.

A scientist wants to do a study about the relationship between emotional regulation and food intake. The participant would be 50 women around 20 years old with BPD. The study is that there's 2 groups, one that will have to attend group therapy and the other won't. Before and after the study (2 months long), the scientist make them all fill some standardised form about emotional regulation. During the 2 months, they all have to write down what they eat with how they feel.

I think this is an experimental plan (pretest and posttest with witness group). Is it?

Do you think it's better to only have women with BPD or I should also have women without the diagnostic? And why do you think so?

I would tend to take only women with BPD because how could the scientist really do an analysis about the effect of the therapy on they emotional impact of the food intake if people are all mix up? What do you think about this?

Thanks in advance to all people willing to help me with this!