Confidence in Avoiding Marijuana Predicted How Often People Used After Treatment, Not Whether They Quit | Research

The takeaway

Among 212 adults in marijuana cessation treatment, self-efficacy for avoiding use was a stronger predictor of how frequently someone used after treatment than whether they achieved complete abstinence.

Read this if you are trying to quit or reduce cannabis use and want to understand how confidence in your ability to avoid use relates to outcomes.

Self-efficacy predicted use frequency better than abstinence status

What the researchers found

Researchers examined self-efficacy, the confidence in one's ability to avoid marijuana use, in 212 adults seeking marijuana cessation treatment.

Self-efficacy measured after treatment completion was more meaningfully connected to theoretically predicted sources (mastery experiences, social modeling, emotional states) than pre-treatment efficacy, suggesting the treatment experience itself shaped these beliefs.

Cognitive-behavioral relapse prevention treatment produced marginally greater self-efficacy than a non-behavioral social support treatment, but the link between specific coping skill training and efficacy was ambiguous.

The most nuanced finding: self-efficacy predicted frequency of post-treatment marijuana use better than it predicted complete abstinence. In other words, people's confidence in their ability to avoid marijuana was related to how often they used, but was less useful for predicting the binary outcome of whether they quit entirely.

Why it matters

This study refined understanding of how psychological constructs predict cannabis cessation. The finding that self-efficacy predicted frequency of use better than abstinence suggests that treatment success may be better measured by reduction in use rather than all-or-nothing quitting.

The numbers in context

212 total participants (161 men, 51 women). Two treatment conditions: relapse prevention vs. social support. Self-efficacy predicted frequency of use better than abstinence status.

How the study worked

Construct validity analysis with 161 men and 51 women seeking marijuana cessation treatment. Self-efficacy was measured before and after treatment. Relationships were examined between efficacy, theoretically proposed sources of efficacy judgments, treatment type, and post-treatment marijuana use outcomes.

What this study cannot tell us

Self-efficacy was self-reported and may reflect optimism rather than actual capability. The relapse prevention treatment produced only marginally greater self-efficacy. The study could not determine whether self-efficacy caused reduced use or whether reduced use boosted self-efficacy.

How to read the evidence

A well-designed construct validity study with 212 participants and post-treatment follow-up. Good methodology but observational in its analysis of efficacy-outcome relationships.

When this study was published

Published in 1995. Cannabis cessation treatment research has expanded, though self-efficacy remains a central construct in addiction treatment theory.

The bigger picture

The distinction between predicting use frequency versus abstinence status has implications for how treatment success is defined. If self-efficacy helps people use less but does not reliably predict complete abstinence, treatment programs might benefit from setting reduction goals alongside abstinence goals.

Questions still open

Can self-efficacy be more effectively enhanced through treatment? Is reduction in use a clinically meaningful outcome for marijuana cessation? Would combining efficacy-building techniques with other approaches improve outcomes?

Common questions

Does believing you can quit help you quit?

Partially. Confidence in avoiding marijuana predicted how often people used after treatment, but was less reliable at predicting whether they achieved complete abstinence.

Did treatment build confidence?

Cognitive-behavioral relapse prevention treatment produced only marginally greater self-efficacy than a social support comparison, suggesting confidence-building is not automatic with treatment.

Read the original research

Self-efficacy and marijuana cessation: a construct validity analysis.

Journal of consulting and clinical psychology, 63(6), 1022-31

View on PubMed ↗

Citation

Stephens, R S; Wertz, J S; Roffman, R A. (1995). Self-efficacy and marijuana cessation: a construct validity analysis.. Journal of consulting and clinical psychology, 63(6), 1022-31.