Doing Statistical Mediation and Moderation

1. A Basic Orientation *My Personal Journey *Confusions about Mediation and Moderation *Mediation and Moderation: The Synergism of Three Variables 2. Historical Background *The History of Mediation and Moderation *Two Strands of Thought within Statistics *The Historical Basis for the Methods of Mediation and Moderation *Baron and Kenny's Landmark Publication *Knowledge Box. A Note about Terminology: IV/DV versus Predictor/Outcome *Clarification of Mediation and Moderation Subsequent to Baron and Kenny's Article *Summary *Further Reading 3. Basic Mediation *Review of Basic Rules for Mediation *How to Do Basic Mediation *Knowledge Box. Controversy: Calculation of whether Significant Mediation Has Occurred *An Example of Mediation with Experimental Data *An Example of Null Mediation *Sobel's z versus Reduction of the Basic Relationship *Suppressor Variables in Mediation *Investigating Mediation When One Has a Nonsignificant Correlation *Understanding the Mathematical ""Fine Print"": Variances and Covariances *Discussion of Partial and Semipartial Correlations *Statistical Assumptions *Summary *Further Reading *In-Chapter Exercises *Additional Exercises 4. Special Topics in Mediation *Model Specification: Testing Models *Knowledge Box. Another Area of Potential Confusion: Implications for Naming Different Types of Mediation Results *Multiple Mediators *Bootstrapping (Resampling) *Longitudinal Mediation Models *Multilevel Mediation Models *Categorical Mediators and/or Outcomes (Logistic Regression) *Mediation with Quadratic Relationships *Summary *Further Reading *In-Chapter Exercises 5. Basic Moderation *Categorical Variable Moderation *Knowledge Box. A Short Tutorial on Dummy Coding *An Example of a Continuous Moderator *Knowledge Box. Graphing Moderation Patterns *Further Reading *In-Chapter Exercises *Additional Exercises 6. Special Topics in Moderation *Johnson-Neyman Regions of Significance *Multiple Moderator Regression Analyses *Moderation of Residualized Relationships *Quadratic Moderation *Basic Moderation in Path Analyses *Moderation in Multilevel Modeling (MLM) *Moderation with Latent Variables *Logistic Moderation? *Summary *Further Reading *In-Chapter Exercises *Additional Exercises 7. Mediated Moderation and Moderated Mediation *The Literature *Mediated Moderation: A Baron and Kenny-type Example *Moderated Mediation *Where to from Here? Bootstrapping for Moderated Mediation *More Complicated Variants: Moderated Mediated Moderation *Other Variants *Conclusions *Further Reading Suggested Answers to Exercises Appendix A. SPSS, Amos, and MPlus Models Appendix B. Resources for Researchers Who Use Mediation and Moderation