Mediation and moderation
Content for Friday, November 25, 2022
Content
- Linear mediation model
- Moderation
Learning objectives
At the end of the session, students should be capable of
- Using the linear mediation model
- discussing limitations of the linear mediation model
- testing for moderating variables (interactions)
Readings
Chapter 11 of the course notes
Chapter 11 of VanderWeele (2015)
Linear mediation model (Baron & Kenny, 1986)
Limitations of the linear mediation model approach (Bullock et al., 2010)
Model assumptions Imai et al. (2010)
Slides
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Tip
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References
Baron, R., & Kenny, D. (1986). The moderator-mediator variable distinction in social psychological research: Conceptual, strategic, and statistical considerations. Journal of Personality and Social Psychology, 51(6), 1173–1182. https://doi.org/10.1037/0022-3514.51.6.1173
Bullock, J. G., Green, D. P., & Ha, S. E. (2010). Journal of personality and social psychology. 98(4), 550–558. https://doi.org/10.1037/a0018933
Imai, K., Keele, L., & Tingley, D. (2010). A general approach to causal mediation analysis. Psychological Methods, 15(4), 309–334. https://doi.org/10.1037/a0020761
Pearl, J. (2014). Interpretation and identification of causal mediation. Psychological Methods, 19(4), 459–481. https://doi.org/10.1037/a0036434
VanderWeele, T. (2015). Explanation in causal inference: Methods for mediation and interaction. Oxford University Press.