A clinical psychologist developed a new psychotherapy for depression that he calls "shame therapy." In a shame therapy session, he tries to make the client feel bad about being depressed so that they will "snap out of it." To test the effectiveness of shame therapy, he recruits 50 depressed people who are seeking psychotherapy. He gives them a standardized measure of depression and then four weeks of shame therapy. Then he gives them the same standardized measure of depression. He finds that their depression scores drop from a mean of 26 before the therapy to a mean of only 21 after the therapy. The standard deviation of the depression scores at both time points is 10.

What research design would we use ?

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The research design described here is a prepost intervention design The psychologist ... View the full answer