Klaus is a psychology graduate student who wants to determine whether electroconvulsive therapy is an effective treatment for schizophrenia. To combine the results of numerous published studies on this issue, Klaus should use a technique called

Klaus is a psychology graduate student who wants to determine whether electroconvulsive therapy is an effective treatment for schizophrenia. To combine the results of numerous published studies on this issue, Klaus should use a technique called









A. the double-blind procedure.
B. factor analysis.
C. counterconditioning.
D. meta-analysis.















Answer: D


AP Psychology

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