This study was aimed to examine the Attitudes-Social influence-Efficacy Model for the use of MDMA among college students in Taiwan. A representative sample of 3743 college students participated in this study. Each participant completed a comprehensive survey and 3090 valid data were collected. Correlation analyses displayed that either positive outcome expectancy or social influence was positively related to intention while refusal self-efficacy was negatively associated with intention. Using the Structural Equation Model, the results showed that the model fitted the data well. Intention for using MDMA affected MDMA use. Refusing self-efficacy significantly predicted intention and MDMA use indirectly via intention. Social influence had a direct impact on intention or MDMA use as well as an indirect effect on MDMA use via intention. However, positive outcome expectancy did not have an effect on both intention and the use of MDMA. Our results suggested that preventive programs in colleges for MDMA use should focus on developing strategies in decreasing the social influence and enhancing the refusal self-efficacy.
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