Critical thinking disposition as a measure of competent clinical judgment: the development of the California Critical Thinking Disposition Inventory.

Assessing critical thinking skills and disposition is crucial in nursing education and research. The California Critical Thinking Disposition Inventory (CCTDI) uses the Delphi Report's consensus definition of critical thinking as the theoretical basis to measure critical thinking disposition. Item analysis and factor analysis techniques were used to create seven disposition scales, which grouped the Delphi dispositional descriptions into larger, more unified constructs: open-mindedness, analyticity, cognitive maturity, truth-seeking, systematicity, inquisitiveness, and self-confidence. Cronbach's alpha for the overall instrument, the disposition toward critical thinking, is .92. The 75-item instrument was administered to an additional sample of college students (N = 1019). The alpha levels in the second sample remained relatively stable, ranging from .60 to .78 on the subscales and .90 overall. The instrument has subsequently been used to assess critical thinking disposition in high school through the graduate level but is targeted primarily for the college undergraduates. Administration time is 20 minutes. Correlation with its companion instrument, the California Critical Thinking Skills Test, also based on the Delphi critical thinking construct, was measured at .66 and .67 in two pilot sample groups.