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Study breakdown

Tailored anti-cannabis messages worked better than generic ones for at-risk teens

Randomized Controlled TrialModerate evidence
The takeaway

A sequential messaging approach that first destabilized resistance to prevention messages and then delivered tailored gain-framed communications reduced cannabis use intentions in at-risk adolescents who perceived cannabis use as normative.

Prevention program designers, public health communicators, school-based intervention developers

Tailored gain-framed messages reduced cannabis use intentions at 2-month follow-up

What the researchers found

In Study 1 (N=808), at-risk adolescents who perceived cannabis use as normative showed lowest usage intentions after receiving a tailored gain-framed message. In Study 2 (N=391), at-risk teens with normative beliefs and pro-cannabis attitudes who received the tailored gain-framed communication showed decreased cannabis attitude certainty and lower usage intentions 2 months later.

Why it matters

Most cannabis prevention campaigns fail because they use one-size-fits-all messaging. This study demonstrates that tailoring messages to individual beliefs about peer norms and using sequential persuasion strategies can improve effectiveness for the hardest-to-reach youth.

The numbers in context

Study 1: N=808, ages 11-16; Study 2: N=391; gain-framed tailored message produced lowest usage intentions (p<0.05); effects sustained at 2-month follow-up (p<0.05)

How the study worked

Two studies with cannabis-abstinent middle and high school students ages 11-16. Study 1 compared gain- and loss-framed messages tailored to normative perceptions. Study 2 used a sequential approach: first destabilizing anti-message attitudes through rebuttal feedback, then delivering tailored vs. non-tailored messages. Follow-up at 2 months.

What this study cannot tell us

Only cannabis-abstinent students were included, so effects on actual users are unknown. Florida-based samples may not generalize nationally. Self-reported intentions may not translate to behavior. 2-month follow-up is relatively short.

How to read the evidence

Two complementary experimental studies with adequate sample sizes and follow-up, though limited to cannabis-abstinent youth.

When this study was published

Published in 2021.

The bigger picture

The approach of first weakening resistance and then delivering personalized messages represents a more sophisticated prevention strategy that could be scaled through digital platforms where real-time tailoring is feasible.

Questions still open

  • Would this approach work for adolescents who have already tried cannabis? Can digital platforms deliver this sequential messaging strategy at scale?

Common questions

What made the messages effective?
The approach combined two strategies: first, destabilizing teens' resistance to anti-cannabis messages through personalized rebuttal feedback, then delivering a gain-framed message tailored to their specific beliefs about how common cannabis use is among peers.
What is a gain-framed message?
A gain-framed message emphasizes the benefits of not using cannabis (what you gain by abstaining), as opposed to a loss-framed message that emphasizes the harms of using. For at-risk teens who perceived cannabis as normative, gain-framed messages were more effective.

Read the original research

A Rebuttal-Based Social Norms-Tailored Cannabis Intervention for At-Risk Adolescents.

Prevention science : the official journal of the Society for Prevention Research, 22(5), 609-620

Citation

Donaldson, Candice D; Alvaro, Eusebio M; Ruybal, Andrea L; Coleman, Michael; Siegel, Jason T; Crano, William D. (2021). A Rebuttal-Based Social Norms-Tailored Cannabis Intervention for At-Risk Adolescents.. Prevention science : the official journal of the Society for Prevention Research, 22(5), 609-620. https://doi.org/10.1007/s11121-021-01224-9

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