Required sample size to detect the mediated effect

Matthew S. Fritz; David Mackinnon

doi:10.1111/j.1467-9280.2007.01882.x

Required sample size to detect the mediated effect

Matthew S. Fritz, David Mackinnon

Psychology

Research output: Contribution to journal › Article › peer-review

2882 Scopus citations

Abstract

Mediation models are widely used, and there are many tests of the mediated effect. One of the most common questions that researchers have when planning mediation studies is, "How many subjects do I need to achieve adequate power when testing for mediation?" This article presents the necessary sample sizes for six of the most common and the most recommended tests of mediation for various combinations of parameters, to provide a guide for researchers when designing studies or applying for grants.

Original language	English (US)
Pages (from-to)	233-239
Number of pages	7
Journal	Psychological Science
Volume	18
Issue number	3
DOIs	https://doi.org/10.1111/j.1467-9280.2007.01882.x
State	Published - Mar 2007

ASJC Scopus subject areas

General Psychology

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10.1111/j.1467-9280.2007.01882.x

Cite this

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Required sample size to detect the mediated effect

Abstract

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