Phonological and lexical development in normal and late-talking toddlers

Abstract

Abstract Toddlers in the lowest tenth percentile for lexical production, based on parental report (late talkers), were compared with age- and language-matched controls on measures of phonetic complexity, lexical development, and grammatical complexity. Late talkers were placed in the pre-meaningful speech group if they produced fewer than 10 different words or in the meaningful speech group if they produced more than 10 different words in a spontaneous language sample. Late talkers who had entered the meaningful speech stage scored higher than those who had not on most of the measures of phonology, lexical, and grammatical complexity in intelligible speech, but not on measures of phonological development in babble. These results are compatible with other studies that found an overlap between phonology, lexicon, and grammar, as well as with those that suggested the importance of true consonant production for lexical development.

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