Abstract
Confirmation bias refers to the tendency to prioritise confirming over disconfirming information. A closer look reveals that confirmation bias actually consists of various aspects such as ignoring disconfirming evidence, underweighting such evidence, and a reluctance to change one’s mind. Although confirmation bias has been studied in some detail, to date, there is no measure of individual differences in confirmation proneness. This absence is unfortunate, because it hinders scientific progress. In addition, measures of confirmation proneness could be fruitfully applied in various situations in psychological practice. In the current research, a 10-item self-report measure of confirmation proneness (the Confirmation Inventory: CI) was developed (Study 1). In Study 2, the CI was found to possess adequate test-retest reliability. In Study 3, higher scores on the CI were found to be associated with confirmatory decision-making in several decision-making paradigms. (Netherlands Journal of Psychology, 64, 87-93.)
Published Version
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