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Marijuana and hostility in a small-group setting

C Salzman, B A Van Der Kolk, R I Shader

The American Journal of Psychiatry

|September 1, 1976

Summary

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Marijuana use slightly decreased hostile feelings and verbal aggression in a small group study. Findings suggest the relationship between cannabis and hostility is complex, influenced by various factors.

Area of Science:

Psychology
Psychopharmacology

Background:

Research on the effects of marijuana on aggression has yielded inconsistent findings.
Understanding the relationship between cannabis and hostility is crucial for public health and clinical practice.

Purpose of the Study:

To investigate the effects of marijuana on both self-reported hostile affect and observed verbal hostility.
To examine these effects in a controlled small-group setting with a frustration stimulus.

Main Methods:

Participants were administered marijuana or a placebo in a small-group setting.
Hostile affect was measured via self-report.
Verbal hostility was assessed through behavioral observation.
A frustration stimulus was introduced to gauge reactions.

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Main Results:

Marijuana subjects reported a statistically significant decrease in hostile feelings post-frustration.
Marijuana subjects exhibited significantly less verbal hostility than placebo subjects, both before and after the frustration stimulus.
A small but significant reduction in hostile affect was observed in the marijuana group.

Conclusions:

Marijuana may reduce hostile feelings and verbal aggression in certain contexts.
The relationship between marijuana and hostility is likely multidetermined.
Factors such as dose, environment, stimulus nature, and individual differences may modulate these effects.