A Meta-Analysis in 1980 Examined the Results of 475 Separate

Multiple Choice

A meta-analysis in 1980 examined the results of 475 separate studies of the effectiveness of psychotherapy. What did the researchers conclude on the basis of their meta-analysis?

A) Overall, behavior therapies were more effective than psychoanalytic therapies.
B) Lengthy treatments were, on average, more effective than brief treatments.
C) The typical client was better off than 75% of individuals who were not treated.
D) all of the above