Three studies involving 257 undergraduates examined whether a simple choice reaction time task could predict daily experiences of affect. Individuals who were fast to make negative evaluations experienced more negative affect and more somatic symptoms and were less satisfied with their lives, compared with individuals who were slow to make negative evaluations. A fourth study, involving 89 undergraduates, indicated that performance on the task was relatively unaffected by transitory mood states. The results support the idea that categorization provides a useful perspective on personality functioning.
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