Abstract

Multilevel models are increasingly used to estimate models for hierarchical and repeated measures data. The authors discuss a model in which there is mediation at the lower level and the mediational links vary randomly across upper level units. One repeated measures example is a case in which a person's daily stressors affect his or her coping efforts, which affect his or her mood, and both links vary randomly across persons. Where there is mediation at the lower level and the mediational links vary randomly across upper level units, the formulas for the indirect effect and its standard error must be modified to include the covariance between the random effects. Because no standard method can estimate such a model, the authors developed an ad hoc method that is illustrated with real and simulated data. Limitations of this method and characteristics of an ideal method are discussed.

Keywords

Multilevel modelPsychologyMediationStatisticsCovarianceAffect (linguistics)Standard errorMoodRandom effects modelEconometricsMathematicsSocial psychology

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Publication Info

Year
2003
Type
article
Volume
8
Issue
2
Pages
115-128
Citations
682
Access
Closed

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David A. Kenny, Josephine D. Korchmaros, Niall Bolger (2003). Lower level mediation in multilevel models.. Psychological Methods , 8 (2) , 115-128. https://doi.org/10.1037/1082-989x.8.2.115

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DOI
10.1037/1082-989x.8.2.115