Beliefs and anticipated situations influencing intentions to use drugs.

Unique differences between usage segments in beliefs, perceptions, and anticipated situational influences regarding the salient dimensions underlying motivations to use marijuana are described. An extended model of behavioral intention is used for examining and explaining motivations to use marijuana in an attempt to replicate and extend recent research on drugs. Respondents' opinions concerning the interventing influences of external situations on the intentions-behavior relationship are also addressed. Implications for public policymakers concerned with drug-related social issues are also provided.