The observed friend drug talk scale was based on coders’ macroratings of the Peer Interaction Task. It was averaged from eight macroratings that reflected observations of the friend (a) making favorable or specific references to alcohol, tobacco, marijuana, cocaine, hallucinogens, speed or meth; (b) appearing to be favorable toward alcohol or drug use at a party; and (c) boasting about alcohol or drug use at a party. Each macrorating was scored on a scale ranging from 1 (not at all) to 9 (very much). Internal consistency for this scale was adequate (α = 0.77, mean inter-item correlation = 0.29).
