Integrated Theory of Planned Behavior With Extrinsic Motivation to Predict Intention Not to Use Illicit Drugs by Fifth-Grade Students in Taiwan

Jung Yu Liao, Li Chun Chang, Hsiao Pei Hsu, Chiu Mieh Huang, Su Fei Huang, Jong-Long Guo

Research output: Contribution to journalArticle


This study assessed the effects of a model that integrated the theory of planned behavior (TPB) with extrinsic motivation (EM) in predicting the intentions of fifth-grade students to not use illicit drugs. A cluster-sampling design was adopted in a cross-sectional survey (N = 571). The structural equation modeling results showed that the model attained an acceptable overall fit and explained 85% of the variance in intention. The EM variables influenced intention through subjective norms and perceived behavioral control. Study findings support the proposed TPB-EM model and show that EM can foster a social cognitive mechanism that indirectly affects intention.

Original languageEnglish
Pages (from-to)454-462
Number of pages9
JournalJournal of Child and Adolescent Substance Abuse
Issue number6
Publication statusPublished - 2017 Nov 2



  • elementary school students
  • extrinsic motivation
  • illicit drug use
  • theory of planned behavior

ASJC Scopus subject areas

  • Social Psychology
  • Education
  • Psychology(all)
  • Public Health, Environmental and Occupational Health

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