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date: 18 November 2019

Abstract and Keywords

Meta-analysis is now the method of choice for assimilating research investigating the same question. This chapter is a nontechnical overview of the process of conducting meta-analysis in the context of clinical psychology. We begin with an overview of what meta-analysis aims to achieve. The process of conducting a meta-analysis is then described in six stages: (1) how to do a literature search; (2) how to decide which studies to include in the analysis (inclusion criteria); (3) how to calculate effect sizes for each study; (4) running a basic meta-analysis using the metaphor package for the free software R; (5) how to look for publication bias and moderators of effect sizes; and (6) how to write up the results for publication.

Keywords: Meta-analysis, effect sizes, publication bias, moderator analysis, R

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