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A number of personality correlates of decision in a psychophysical situation were found. Overly confident people tended to be rigid and dogmatic; overly cautious people tended toward introspection and self-abasement, and individuals with realistic confidence in their decisions appeared to be self-reliant and socially perceptive. Fast deciders (in this particular situation) were passive, suggestible, and conforming, while slow deciders were ascendant, self-assured, and humorous. (PsycINFO Database Record (c) 2006 APA, all rights reserved)
Block et al. (Fri,) studied this question.