Doing Statistical Mediation and Moderation

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Written in a friendly, conversational style, this book offers a hands-on approach to statistical mediation and moderation for both beginning researchers and those familiar with modeling. Starting with a gentle review of regression-based analysis, Paul Jose covers basic mediation and moderation techniques before moving on to advanced topics in multilevel modeling, structural equation modeling, and hybrid combinations, such as moderated mediation. User-friendly features include numerous graphs and carefully worked-through examples; "Helpful Suggestions" about procedures and pitfalls; "Knowledge Boxes" delving into special topics, such as dummy coding; and end-of-chapter exercises and problems (with answers). The companion website provides downloadable sample data sets that are used in the book to demonstrate particular analytic strategies, and explains how researchers and students can execute analyses using Jose's online programs, MedGraph and ModGraph. Appendices present SPSS, AMOS, and Mplus syntax for conducting the key types of analyses.

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Editorial Reviews

From the Publisher

"The examples are great and are used effectively. In the basic model chapters, readers can learn from these examples about how to actually fit these models, how to read and interpret the output, and, most important, the right language to report the findings. The book's emphasis on using graphs to visualize model results will make it easier for novices to grasp subtle concepts and avoid pitfalls. The author's MedGraph and ModGraph are great tools. I would consider using this book as a supplement in an advanced statistics class. Its conversational style will complement the more formal presentation of most textbooks."--Maria M. Wong, PhD, Department of Psychology, Idaho State University

"Jose has done a terrific job of laying out the importance of investigating mediation and moderation effects, as well as providing strategies to address them. Strengths of this clearly written book include the link between mediation and moderation theory and the statistical analysis testing these theories. The examples will prove useful to researchers in many fields."--David MacKinnon, PhD, Department of Psychology, Arizona State University

"One of the first volumes to focus on mediation and moderation, this book explains their differences from historical, substantive, and modeling perspectives. It is abundant with 'how-to' examples and provides readers with modeling tools that can be used directly in research. This is a suitable supplemental text for intermediate or advanced courses dealing with regression, hierarchical linear modeling, or structural equation modeling. The inclusion of cutting-edge topics such as mediated moderation and moderated mediation will attract more advanced quantitative researchers as well."--Feifei Ye, PhD, Department of Psychology in Education, University of Pittsburgh


“This book offers a brief and readable introduction to moderation and mediation, including alternate contexts in which such effects are likely to emerge, statistical strategies for their evaluation, and different types of models that represent manifestations of mediation and moderation. The focus on and clarification of the difference between mediation and moderation distinguish this contribution from the other most recent publications in this area….For the person wanting a comprehensive introduction to themes associated with the concepts of mediation and moderation, Doing Statistical Mediation and Moderation represents a worthwhile addition to one's library. The variety of topics covered…is impressive….Throughout, Jose offers a slew of online resources for learning more about special topics in mediation and moderation and for conducting analyses….A useful contribution to the literature on more sophisticated structural models. Researchers who are interested in improving their effectiveness as modelers of relationships involving three or more variables will find it a valuable contribution as an introduction to the broad conceptual issues related to mediation and moderation, and as a source of useful tools and resources.”--PsycCRITIQUES
American Statistician

“A really nice aspect of the book is that the author provides all the datasets analyzed, allowing the readers to directly use them to learn and practice. In the appendices, the book provides suggested answers to the exercises, statistical software implementations, and Internet resources for mediation and moderation analysis….This book is an excellent introductory level mediation and moderation analysis textbook….It clearly explains the basic research questions and the corresponding regression-based statistical tools dealing with them. Applied researchers interested in applying linear regression-based mediation and moderation techniques to their own data could find an excellent starting point within its pages.”--American Statistician
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Product Details

  • ISBN-13: 9781462508150
  • Publisher: Guilford Publications, Inc.
  • Publication date: 4/19/2013
  • Series: Methodology In The Social Sciences Series
  • Pages: 336
  • Sales rank: 704,572
  • Product dimensions: 6.00 (w) x 9.20 (h) x 0.70 (d)

Meet the Author

Paul E. Jose, PhD, is Associate Professor of Psychology and Director of the Roy McKenzie Centre for the Study of Families at Victoria University of Wellington in New Zealand. He received his doctorate in Developmental Psychology from Yale University, completed his postdoctoral work at the University of Illinois at Champaign-Urbana, and taught and conducted research at Loyola University Chicago for 15 years. Dr. Jose's research interests include gender differences in spoken discourse, moral development, cross-cultural comparisons of adolescent coping and family dynamics, children's preparation and motivation for academic achievement, adolescent anxiety and depression, and positive psychology. He has used mediation and moderation for over 20 years in his work.
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Table of Contents

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
*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
*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
*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?
*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
*Further Reading
Suggested Answers to Exercises
Appendix A. SPSS, Amos, and MPlus Models
Appendix B. Resources for Researchers Who Use Mediation and Moderation
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