Department of Psychology, University of South Carolina, Barnwell College, Columbia, SC, 29208, USA.
J Sch Psychol. 2010 Feb;48(1):53-84. doi: 10.1016/j.jsp.2009.09.001.
Third variable effects elucidate the relation between two other variables, and can describe why they are related or under what conditions they are related. This article demonstrates methods to analyze two third-variable effects: moderation and mediation. The utility of examining moderation and mediation effects in school psychology is described and current use of the analyses in applied school psychology research is reviewed and evaluated. Proper statistical methods to test the effects are presented, and different effect size measures for the models are provided. Extensions of the basic moderator and mediator models are also described.
第三变量效应阐明了两个其他变量之间的关系，并可以描述它们为什么相关或在什么条件下相关。本文介绍了分析两种第三变量效应的方法：调节和中介。描述了在学校心理学中检查调节和中介效应的效用，并回顾和评估了这些分析在应用学校心理学研究中的当前使用情况。提出了检验这些效应的适当统计方法，并为模型提供了不同的效应量度量。还描述了基本调节和中介模型的扩展。
