Upon witnessing a causal event, do children's gestures encode causal knowledge that (a) does not appear in their linguistic descriptions or (b) conveys the same information as their sentential expressions? The former use of gesture is considered supplementary; the latter is considered reinforcing. Sixty-four English-speaking children aged 2.5-5…

In the study reported here, Japanese-speaking children aged 3-6 were confronted with making choices based on conflicting input from speakers who varied in the degree of certainty and the quality of evidence they possessed for their opinions. Certainty and evidentiality are encoded in Japanese both in high-frequency, closed-class, sentence-final…