A meta-analysis is a quantitative research procedure used to synthesize the results of many similar empirical studies on a topic of interest. A 12-step process for conducting a meta-analysis of counseling outcome research is presented, and the process is demonstrated using a small-scale application of eight published studies exploring the effects of cognitive–behavioral therapy on participants with posttraumatic stress disorder.
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Erford et al. (2010) studied this question.
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