Adding pictures to cannabis warning labels significantly improved health risk recall in young adults
In an experiment with 523 at-risk young adults, cannabis warning labels with pictures improved recall accuracy and perceived effectiveness compared to current text-only California labels.
Quick Facts
What This Study Found
Pictorially enhanced cannabis warning labels significantly improved recall accuracy (b = 0.59, p < 0.001) and perceived message effectiveness (b = 0.31, p = 0.008) compared to current California labels. Text-only enhanced labels also improved recall (b = 0.30, p = 0.011) but did not improve perceived effectiveness. The effectiveness of pictorial labels was mediated by negative emotions rather than information recall.
Key Numbers
523 at-risk young adults ages 18-26. Pictorial labels: recall b = 0.59, effectiveness b = 0.31. Text-only enhanced: recall b = 0.30, effectiveness NS. Pictorial outperformed text-only for recall (b = 0.28, p = 0.019).
How They Did This
Online national experiment with 523 young adults (18-26) at risk for cannabis use, randomly assigned to view current California cannabis warning labels or enhanced versions with varying textual and pictorial components. Linear regression compared outcomes.
Why This Research Matters
Current cannabis warning labels may be ineffective at communicating health risks. This study provides evidence that relatively simple design changes, particularly adding pictures, could significantly improve public health messaging.
The Bigger Picture
Tobacco warning labels with graphic images have been highly effective. This study suggests a similar approach could work for cannabis, especially as the industry expands and harm perception continues to decline among young people.
What This Study Doesn't Tell Us
Online experiment may not reflect real-world label viewing. Single exposure; cumulative effects unknown. At-risk young adults may not represent all cannabis consumers. California labels used as the comparison; other states may differ.
Questions This Raises
- ?Would pictorial cannabis warnings reduce actual cannabis use, as tobacco warnings reduced smoking?
- ?Would the cannabis industry resist mandatory pictorial labels as the tobacco industry did?
Trust & Context
- Key Stat:
- Pictorial labels improved recall 97% more than text-only enhancements
- Evidence Grade:
- Randomized experiment with appropriate controls and large sample, though online setting limits ecological validity.
- Study Age:
- Published in 2022, experiment conducted October 2020.
- Original Title:
- Textual and pictorial enhancement of cannabis warning labels: An Online experiment among at-risk U.S. young adults.
- Published In:
- Drug and alcohol dependence, 237, 109520 (2022)
- Authors:
- Kim, Sang Jung, Minich, Matt(2), Tveleneva, Arina, Liu, Jiaying, Padon, Alisa A, Silver, Lynn D, Yang, Sijia
- Database ID:
- RTHC-03961
Evidence Hierarchy
Participants are randomly assigned to treatment or placebo groups to test cause and effect.
What do these levels mean? →Frequently Asked Questions
Do cannabis warning labels work?
Current text-only labels appear less effective. This study found that adding pictures to cannabis warning labels significantly improved health risk recall and perceived message effectiveness among at-risk young adults.
Should cannabis labels have pictures like cigarette packages?
This study supports that approach. Pictorial cannabis warning labels outperformed both current labels and text-only enhanced labels at improving recall and perceived effectiveness.
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Cite This Study
https://rethinkthc.com/research/RTHC-03961APA
Kim, Sang Jung; Minich, Matt; Tveleneva, Arina; Liu, Jiaying; Padon, Alisa A; Silver, Lynn D; Yang, Sijia. (2022). Textual and pictorial enhancement of cannabis warning labels: An Online experiment among at-risk U.S. young adults.. Drug and alcohol dependence, 237, 109520. https://doi.org/10.1016/j.drugalcdep.2022.109520
MLA
Kim, Sang Jung, et al. "Textual and pictorial enhancement of cannabis warning labels: An Online experiment among at-risk U.S. young adults.." Drug and alcohol dependence, 2022. https://doi.org/10.1016/j.drugalcdep.2022.109520
RethinkTHC
RethinkTHC Research Database. "Textual and pictorial enhancement of cannabis warning labels..." RTHC-03961. Retrieved from https://rethinkthc.com/research/kim-2022-textual-and-pictorial-enhancement
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkTHC research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.