Systematic assessments of the influence of interpersonal relationship variables on outcome are lacking in investigations of smoking treatments. The present study undertook an investigation of the influence of group cohesiveness on two multicomponent behavioral treatments of smoking. Subjects (41 women and 31 men) were randomly assigned to treatment according to a 2 (enriched vs. standard cohesiveness) X 2 (satiation vs. nicotine fading) factorial design. Enriched cohesiveness subjects not only scored higher on several indexes of cohesion but tended to be more successful over a short term in modifying their smoking behavior.

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