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Methodological Issues in Estimating Main and Interactive Effects: Examples from Coping/Social Support and Stress Field

John W. Finney, Roger E. Mitchell, Ruth C. Cronkite and Rudolph H. Moos
Journal of Health and Social Behavior
Vol. 25, No. 1 (Mar., 1984), pp. 85-98
Stable URL: http://www.jstor.org/stable/2136706
Page Count: 14
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Methodological Issues in Estimating Main and Interactive Effects: Examples from Coping/Social Support and Stress Field
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Abstract

Although used increasingly frequently, statistical analyses to explore moderating as well as main effects have not always been well-understood by researchers in the stress and coping/support field. We attempt to clarify three areas of potential confusion. First, three approaches for estimating main effects in multiple regressions with significant interaction effects and two methods for estimating main effects when a test for interaction has not reached statistical significance are evaluated. Second, multiple within-groups analysis is explored as an alternative to product-term regression analysis for probing interaction effects. Third, stress-attenuation analysis is distinguished from analyses of stress-moderating effects by locating both within the general framework of the elaboration paradigm.

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