In two experiments, mothers told their infant and an adult a story that involved target words, and women taught an assembly procedure involving novel terminology to another adult. In speech to infants, mothers positioned focused words on pitch peaks, but in speech to adults, the emphasis was more variable. (BC)

Tests the universality hypothesis of language acquisition by asking young monolingual English and Japanese children to verify true affirmatives, false affirmatives, false negatives, and true negatives. The hypothesis was not supported in the case of Japanese-speaking children. A theory of cross-linguistic language acquisition is proposed.…