Incidental choice over the features of a task provides both control and personalization. Previous accounts of the tendency of choice to enhance task confidence have emphasized the importance of perceived control. The authors reexamined the enhancement effect to determine whether personalization is equally important. The results of two studies revealed that only choices reflecting personal preferences increased confidence in the task outcome (Study 1) and boosted performance-related self-esteem (Study 2). These findings point to the importance of self-identity expression for understanding the judgmental effects of choice.
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Tafarodi et al. (2002) studied this question.
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