How Norms Work: Self-Identification, Attitude, and Self-Efficacy Mediate the Relation between Descriptive Social Norms and Vegetable Intake

F.M. Stok, K.T. Verkooijen, D.T.D. de Ridder, J.B.F. Wit, E. de Vet

Research output: Contribution to journalArticleAcademicpeer-review

27 Citations (Scopus)

Abstract

Background: The current studies aim to show that descriptive social norms influence vegetable intake and to investigate three potentially underlying processes (self-identification, attitude, and self-efficacy). Methods: In two studies, descriptive social norms regarding vegetable intake were manipulated (majority vs. minority norm). Study 1 investigated both the relation between baseline vegetable intake and self-identification, attitude, and self-efficacy, as well as the effect of the norm manipulation on vegetable intake over a one-week period. Study 2 investigated potential mediation of the effect of the manipulation on vegetable intake intentions through self-identification, attitude, and self-efficacy. Results: Study 1 showed that the proposed mediators were related to a baseline measure of vegetable intake. Moreover, in participants identifying strongly with the norm referent group, majority norms led to higher vegetable consumption than minority norms. Study 2 showed that the direct effect of the social norm manipulation on vegetable intake intentions was partly mediated by self-identification, attitude, and self-efficacy. Conclusions: These studies shed first light on processes underlying the effect of descriptive social norms on health behavior. A norm describing the behavior of a salient social group leads people to identify more with, have more positive attitudes toward, and feel more self-efficacious regarding that behavior.
Original languageEnglish
Pages (from-to)230-250
JournalApplied Psychology : Health and Well-Being
Volume6
Issue number2
DOIs
Publication statusPublished - 2014

Keywords

  • planned behavior
  • identity
  • consumption
  • information
  • obesity
  • fruit
  • diet

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