Determining Power and Sample Size for Simple and Complex Mediation Models

作者：Alexander M. Schoemann, Aaron J. Boulton, Stephen D. Short · 发表于：Social Psychological and Personality Science · 年份：2017 · DOI：10.1177/1948550617715068 · 被引用次数：1819 · 研究领域：Child and Adolescent Psychosocial and Emotional Development、Behavioral and Psychological Studies、Social and Intergroup Psychology

Mediation analyses abound in social and personality psychology. Current recommendations for assessing power and sample size in mediation models include using a Monte Carlo power analysis simulation and testing the indirect effect with a bootstrapped confidence interval. Unfortunately, these methods have rarely been adopted by researchers due to limited software options and the computational time needed. We propose a new method and convenient tools for determining sample size and power in mediation models. We demonstrate our new method through an easy-to-use application that implements the method. These developments will allow researchers to quickly and easily determine power and sample size for simple and complex mediation models.