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In three experiments we compared 5- and 6-year-old children's understanding of multiple interpretations arising from an ambiguous figure (e.g., the duck/rabbit) and other ambiguous partial input. Children found it equally easy to switch between alternative interpretations of ambiguous figures and partial views (Experiment 1, N = 19) and more difficult to accept two characters' conflicting interpretations of ambiguous figures, than partial views (Experiment 2, N = 29). Children found it more difficult to accept explicitly that one stimulus could simultaneously give rise to two interpretations, than to switch between them (Experiment 3, N = 40). Children's handling of multiple interpretations was not primarily affected by the type of input, but results suggest that there are two distinct stages in children's handling of multiple interpretations.

The performance of 93 children aged 3 and 4 years on a battery of different counterfactual tasks was assessed. Three measures: short causal chains, location change counterfactual conditionals, and false syllogisms—but not a fourth, long causal chains—were correlated, even after controlling for age and receptive vocabulary. Children's performance on our counterfactual thinking measure was predicted by receptive vocabulary ability and inhibitory control. The role that domain general executive functions may play in 3- to 4-year olds' counterfactual thinking development is discussed.