ABSTRACT Actively open-minded thinking (AOT) represents a standard for good judgment and decision making and people differ in their proneness to this way of thinking. Studies show that people inclined to AOT are less erroneous and biased on decision-making tasks, hold less unwarranted beliefs and are more accurate in a range of judgments. However, there are very few studies that tested the possibility of teaching AOT. In this study, we report results of an experiment in which we tested the effectiveness of our two newly developed online interventions for teaching AOT, a serious educational computer game and an online module. Results showed weak but encouraging effects of these interventions. Compared to the control group, the interventions managed to somewhat reduce confidence, overconfidence and myside bias, and in the short run increase participants’ tendency to be actively open-minded in various everyday situations.
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