Send to

Choose Destination
See comment in PubMed Commons below
Behav Res Methods. 2009 May;41(2):486-98. doi: 10.3758/BRM.41.2.486.

R2 effect-size measures for mediation analysis.

Author information

  • 1University of South Carolina, Columbia, South Carolina 29208, USA.


R(2) 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.

[PubMed - indexed for MEDLINE]
Free PMC Article
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for PubMed Central
    Loading ...
    Write to the Help Desk