Abstract
The Dichotomous Thinking Inventory (DTI) was developed for this study as a self-report measure used to assess a black-and-white cognitive thinking style or worldview. Validation of the DTI was explored with regard to the relationships among dichotomous thinking, borderline personality, narcissism, self-esteem, undervaluing others, intolerance for ambiguity, perfectionism, and the Big Five; and relationships between dichotomous thinking and peer ratings of traits and attitudes. Factor analysis of the DTI revealed 3 components: preference for dichotomy, dichotomous beliefs, and profit-and-loss thinking. Internal consistency and test-retest reliability of the DTI were at a sufficient level. Correlations among self-measures supported the convergent and discriminant validity of the DTI. Participants who scored highly on the DTI were rated as being articulate and straightforward by their friends. These results generally supported the reliability and validity of the DTI.
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