Marijuana and hostility in a small-group setting.

The authors used several indices to assess the relationship between marijuana and hostility as both inner affect and verbal behavior in a small-group setting. Marijuana subjects reported a small but statistically significant decrease in hostile feelings after the introduction of a frustration stimulus. They also showed significantly less verbal hostility than placebo subjects both before and after introduction of a frustration stimulus. The authors note that research findings on marijuana and hostility are not consistent and suggest a multidetermined relationship based on dose, environment, nature of the frustration stimulus, and intraindividual factors.