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Young children adapt their search behavior for necessary versus merely possible outcomes

Abstract

Although even infants appear to consider multiple possibilities, preschoolers often fail tasks that require reasoning about mutually exclusive alternatives. We review two explanations for this failure: (1) children have a minimal representation of possibility and fail to distinguish necessary from merely possible outcomes; and (2) children are sensitive to this distinction, but competing motivations (e.g., the tendency to explore) can lead to apparent failures. To test these hypotheses, we assessed 3- and 4-year-olds on a novel search task. Here, children searched for an object that was dropped from either a transparent (one necessary location) or opaque (two possible locations) set of inverted Y-shaped tubes. In Exp. 1, we found that children spent less time searching the first location when there were two possible candidates. Exp. 2 replicates these results in a digital task that does not require manual search.

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