Expressive vocabulary and early grammar of 16- to 30-month-old children acquiring Quebec French

This article reports on data obtained through the Quebec-French adaptation of the MacArthur–Bates Communicative Development Inventories – Words and Sentences (N = 826). Results from parent questionnaires show a steady increase in expressive vocabulary and the use of morphology and syntax with age, as well as links between the three components. Strong correlations between parent reports and sample analysis confirm the concurrent validity of the parental reports.