One strategy to evaluate the effectiveness of psychotherapy is to compare people who enter psychotherapy with a matched control group of people who do not receive psychotherapy. when researchers combine and summarize the results of studies using this strategy, what overall conclusions emerge?

When researchers combine and summarize the results of the study on comparing people entering psychotherapy with a matched control group of people who do not receive psychotherapy emerging conclusions with this strategy may constitute a huge different of heightened awareness from the people who had undergone the therapy compared from those who didn't.