Journal
BEHAVIOR RESEARCH METHODS
Volume 41, Issue 2, Pages 486-498Publisher
SPRINGER
DOI: 10.3758/BRM.41.2.486
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Funding
- NATIONAL INSTITUTE ON DRUG ABUSE [R01DA009757, R37DA009757] Funding Source: NIH RePORTER
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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.
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