SITUATIONAL AND EXTENDED ATTITUDE MODELS AS PREDICTORS OF MARIHUANA INTENTIONS AND REPORTED BEHAVIOR

The relative abilities of Fishbein's extended model and Rokeach's situational attitude model to predict and explain marijuana intentions and reported behavior were assessed for 251 male and female university students within the same situational context. Usefulness of model components was assessed in terms of reductions in explained variance when predictor variables are omitted from regression extimations. A split-half cross-validation procedure was used to examine each conceptual framework's ability to predict and explain behavior. Support was found for both conceptual frameworks as predictors of marijuana consumption.