This paper explores a judgment heuristic (Availability - Kahneman et al 1982) from a developmental perspective. A series of four studies, using two different types of task finds that the judgment bias associated with the Availablity heuristic can be replicated in children of 6 years and older. The data support the claim that memory processes play a causal role in the effect. However, there is no support for the claim that the process underlying the Availability effect is involuntary or automatic. Results are discussed in relation to both developmental and adult judgment issues.
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