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A common phenomenon in judgment under uncertainty is that alternative hypotheses are underweighted or ignored. This article addresses when and how the strength of the alternative is taken into account when there are 2 hypotheses. A learning manipulation was used to invoke 2 representations of 2 illnesses in a medical diagnosis task. One representation tended to lead to consideration of the alternative when, for example, requesting new information, reporting confidence, and making diagnoses. Thedoi:10.1037//0278-73188.8.131.521 fatcat:g5gli3olsjdrhfrpbojlqavhmi