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.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5488867 | PMC |
| http://dx.doi.org/10.1016/j.jsp.2009.09.001 | DOI Listing |
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