Optimization of Behavioral, Biobehavioral, and Biomedical Interventions by Linda M. Collins

Author:Linda M. Collins
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

(4.3)

and the MI × PEER × TEXT interaction is

(4.4)

Some readers may find the INT * definition more intuitive, but it has a less straightforward relation to the regression coefficient. Consider the relations among INT MI × PEER , INT * MI × PEER and b MI × PEER :

Thus an effect size for a two-way interaction by the INT* definition translates to a regression coefficient that is half as large as what will be obtained starting with effect size of identical magnitude by the INT definition. This discrepancy grows as the order of the interaction increases. It is straightforward to show that

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