One strategy that children might use to sort words into grammatical categories such as noun and verb is distributional bootstrapping, in which local co-occurrence information is used to distinguish between categories. Words that can be used in more than one grammatical category could be problematic for this approach. Using naturalistic corpus…

Examination of the transition to purposive use of intonation with single words for two infants revealed that both clearly used rising tones to ask questions by 1.5 years of age and demonstrated widespread and gradual grammatical use of intonation. (Author/CB)