Abstract
This study examined whether attitudes towards ambiguity and interpersonal stress events in a diathesis-stress model predicted changes in depression. Sixty-seven female college students were asked to answer the Attitudes Towards Ambiguity Scale (ATAS), and the Zung Self-Rating Depression Scale (SDS). After one month, they were asked to complete the Scale of Interpersonal Stressor (SIS), and SDS. We measured SDS twice in order to investigate residual change of depression. Hierarchical multiple regression analysis showed that the interaction term of negative attitudes toward ambiguity and interpersonal friction significantly predicted changes in depression. Simple slope analysis showed that participants who did not have negative attitudes toward ambiguity and experienced a higher degree of interpersonal friction showed significantly lower reductions in depression scores than those who experienced a lower degree of interpersonal friction. But the other interaction terms were not significant. These results suggest that the diathesis-stress model was not supported and that attitudes towards ambiguity were not sufficient to consider as a diathesis for depression.
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