When base rates are learned and used in an experiential manner subjects show better base rate use, perhaps because the implicit learning system is engaged. A causal framework in which base rates are relevant might also be necessary. Humans might thus perform better on more ecologically valid tasks, which are likely to contain those three components.
Citation
Barbara A. Spellman, The Implicit Use of Base Rates in Experiential and Ecologically Valid Tasks, 19 Behavioral and Brain Sciences 38 (1996).
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