Transcription of Availability: A Heuristic for Judging Frequency and ...
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COGNlTTIVE PSYCHOLOGY 5, 207-232 (1973) Availability: A Heuristic for Judging Frequency and Probability122 AMOS TVERSKY AND DANIEL KAHNEMAN The Hebrew University of Jerusalem and the Oregon Research Institute This paper explores a judgmental Heuristic in which a person evaluates the Frequency of classes or the probability of events by availability, , by the ease with which relevant instances come to mind. In general, avail- ability is correlated with ecological Frequency , but it is also affected by other factors. Consequently, the reliance on the availability Heuristic leads to systematic biases.
the availability heuristic is applied, then such factors will affect the perceived frequency of classes and the subjective probability of events. Consequently, the use of the availability heuristic leads to systematic biases. This paper explores the availability heuristic in a series of ten studies.-l
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