A crosslinguistic study of the relationship between grammar and lexical development

Antonella Devescovi, Maria Cristina Caselli, Daniela Marchione, Patrizio Pasqualetti, Judy Reilly, Elizabeth Bates

Research output: Contribution to journalArticlepeer-review

Abstract

The relationship between grammatical and lexical development was compared in 233 English and 233 Italian children aged between 1;6 and 2;6, matched for age, gender, and vocabulary size on the MacArthur Communicative Development Inventories (CDI). Four different measures of Mean Length of Utterance were applied to the three longest utterances reported by parents, and to corrected/expanded versions representing the 'target' for each utterance. Italians had longer MLUs on most measures, but the ratio of actual to target MLUs did not differ between languages. Age and vocabulary both contributed significant variance to MLU, but the contribution of vocabulary was much larger, suggesting that vocabulary size may provide a better basis for crosslinguistic comparisons of grammatical development. The relationship between MLU and vocabulary size was non-linear in English but linear in Italian, suggesting that grammar 'gets off the ground' earlier in a richly inflected language. A possible mechanism to account for this difference is discussed.

Original languageEnglish
Pages (from-to)759-786
Number of pages28
JournalJournal of Child Language
Volume32
Issue number4
DOIs
Publication statusPublished - Nov 2005

ASJC Scopus subject areas

  • Linguistics and Language
  • Language and Linguistics
  • Psychology(all)
  • Developmental and Educational Psychology
  • Experimental and Cognitive Psychology

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