心理学評論
Online ISSN : 2433-4650
Print ISSN : 0386-1058
特集: 統計革命: Make Statistics Great Again
統計的仮説検定を用いる心理学研究におけるサンプルサイズ設計
村井 潤一郎橋本 貴充
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2018 年 61 巻 1 号 p. 116-136

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Many problems have been reported concerning null hypothesis significance testing (NHST), although it is used in most psychological research. The authors believe that this situation will not change, at least not in the near future. Before shifting to a Bayesian approach, there are several things that must be done in psychological research that uses NHST. Among them, sample size planning (SSP) is especially important. In practice, whether significant results exist primarily depends on sample size, and many studies have indicated that SSP is vital. However, the use of SSP is rare in psychological research. Most psychological research basically depends on the significance of NHST; therefore, psychologists should conduct SSP before collecting data. We describe the present situation of SSP in psychological research, discuss related topics, argue for the importance of SSP, and present future directions for SSP in psychological research using NHST.

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