36 pre-established groups of 4 male or female students (in Ontario) who were users and non-users of cannabis were administered choice-dilemmas involving drug-related risks and non-drug risks. After discussion to a group consensus decision in homogeneous groups of users and non-users or heterogeneous groups, individual choices were again assessed. General trends suggested riskier group and individual choices were made by users, by males, by users after homogeneous groups and non-users after heterogeneous groups. The nature of the social psychological processes of risk-related decisions involving drug use and the nature of these dilemmas and decisions are discussed.
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