The present study tests the mediating role of cognitive complexity in the relationship between a set of motivational attributes (self-efficacy SE, need for cognition NFC and tolerance for ambiguity TFA) and decision-making effectiveness. The model is tested using structural equation modelling in a sample of 59 Romanian entrepreneurs and the results support a partial mediation model. On the one hand, cognitive complexity partially mediates the relationship between self-efficacy and decision-making performance and on the other hand, cognitive complexity fully mediates the relationship between need for cognition and decision performance. The mediation hypothesis concerning tolerance for ambiguity is not supported.
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