全国75の大学図書館所蔵のベストセラーの12年ぶりの新版。複数の統計学的研究から統合的な知見を得る手法を最新の進展に合わせて洗練させつつ明晰に説明する。In particular, the following topics are expanded or newly addressed: Developments in the area of various statistical models; How to choose a statistical model and problems with each model; Developments in the area of how to report heterogeneity in effects; Common mistakes in meta-analysis, and how to avoid them; How to report a meta-analysis; How to use CMA for meta-analysis, and how to interpret the results.