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Selective invalidation of ambivalent pro-marijuana attitude components.
William D Crano1, Candice D Donaldson1, Jason T Siegel1
1Department of Psychology, Claremont Graduate University, Claremont, CA 91711, United States of America.
Addictive Behaviors
|June 2, 2019
Summary
Challenging positive marijuana opinions in ambivalent youth can reduce marijuana use intentions. This study found that invalidating pro-marijuana viewpoints strengthens resistance to drug use.
Area of Science:
- Psychology
- Public Health
- Substance Abuse Prevention
Background:
- Adolescent marijuana use is a significant public health concern.
- Ambivalent attitudes towards marijuana complicate prevention efforts.
- Understanding the role of ambivalence is crucial for effective interventions.
Purpose of the Study:
- To investigate methods for reducing marijuana use intentions in ambivalent adolescents.
- To examine the impact of invalidating pro-marijuana opinions on attitude ambivalence.
- To elucidate the role of attitude ambivalence in persuasive prevention strategies.
Main Methods:
- Recruited marijuana-abstinent middle school students (N=538).
- Selected students (N=101) with negative attitudes toward a prevention appeal.
- Randomly assigned participants to conditions designed to invalidate pro-marijuana opinions.
Main Results:
- Appeals contesting resistant responses significantly decreased ambivalence (p < .01).
- Decreased ambivalence correlated with less favorable attitudes and lower marijuana usage intentions (p < .001).
- An attribution-based manipulation increased ambivalence, leading to positive usage intentions (p < .001).
Conclusions:
- Invalidating pro-marijuana opinions can enhance susceptibility to prevention appeals.
- Reducing attitude ambivalence is a viable strategy in marijuana prevention.
- Further research should explore methods to invalidate pro-marijuana opinions for prevention.
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