Klaun, a graduate student in psychology, aims to evaluate the effectiveness of electroconvulsive therapy for schizophrenia by synthesizing data from multiple published studies. Which method should Klaun employ to achieve this?

Explanation

Meta-analysis is a statistical approach used to combine the findings from several independent studies on the same topic, providing a more comprehensive understanding of the overall effect. This technique is appropriate for Klaun's goal of summarizing research on electroconvulsive therapy for schizophrenia. Other options like counterconditioning or factor analysis do not serve this purpose.