R2 effect-size measures for mediation analysis

Amanda J. Fairchild, David Mackinnon, Marcia P. Taborga, Aaron B. Taylor

Research output: Contribution to journalArticle

150 Citations (Scopus)

Abstract

R2 effect-size measures are presented to assess variance accounted for in mediation models. The measures offer a means to evaluate both component paths and the overall mediated effect in mediation models. Statistical simulation results indicate acceptable bias across varying parameter and sample-size combinations. The measures are applied to a real-world example using data from a team-based health promotion program to improve the nutrition and exercise habits of firefighters. SAS and SPSS computer code are also provided for researchers to compute the measures in their own data.

Original languageEnglish (US)
Pages (from-to)486-498
Number of pages13
JournalBehavior Research Methods
Volume41
Issue number2
DOIs
StatePublished - May 2009

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Firefighters
Health Promotion
Sample Size
Habits
Research Personnel
Exercise
Mediation
Effect Size
Simulation
Real World
Habit
Nutrition

ASJC Scopus subject areas

  • Psychology(all)
  • Psychology (miscellaneous)
  • Experimental and Cognitive Psychology

Cite this

R2 effect-size measures for mediation analysis. / Fairchild, Amanda J.; Mackinnon, David; Taborga, Marcia P.; Taylor, Aaron B.

In: Behavior Research Methods, Vol. 41, No. 2, 05.2009, p. 486-498.

Research output: Contribution to journalArticle

Fairchild, AJ, Mackinnon, D, Taborga, MP & Taylor, AB 2009, 'R2 effect-size measures for mediation analysis', Behavior Research Methods, vol. 41, no. 2, pp. 486-498. https://doi.org/10.3758/BRM.41.2.486
Fairchild, Amanda J. ; Mackinnon, David ; Taborga, Marcia P. ; Taylor, Aaron B. / R2 effect-size measures for mediation analysis. In: Behavior Research Methods. 2009 ; Vol. 41, No. 2. pp. 486-498.
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