The paper reports the results from 16 versions of a simple probability estimation task, where probability estimates derived from base-rate information have to be modified by case knowledge. In the bus problem [adapted from Falk, R., Lipson, A., & Konold, C. (1994), the ups and downs of the hope function in a fruitless search. In G. Wright & P.…

Eight experiments examined whether certain human problem-solving mechanisms should be expected to represent probability information in terms of frequency. Findings are consistent with literature indicating that frequentist representations eliminate various cognitive biases, including overconfidence, the conjunction fallacy, and base rate neglect.…