| Abstract: | Thirty-six three-, four-, and five-year-old boys and girls were asked to act out, with appropriate toys, 48 sentences presented with instructions to make the toys do what E said. Sentences were designed to test the effects on comprehension of (a) event probability, (b) sentence voice, and (c) subject/object animateness. Sentences with either an animate subject and object, or an inanimate subject and object, were considered to be reversible; however, not all reversible sentences were symmetrical with respect to event probability. All main effects were significant, and performance improved with age. The significant interactions indicated that there is a difference between animateness and inanimateness in reversible sentences. The data also suggested that (a) animateness may be an important variable in children's early comprehension of speech, and (b) the traditional definition of reversibility should be modified to unconfound the effects of event probability and animateness. |
