Assessing the communicative development of 30 to 50-month old Basque children: The Basque version of the MacArthur-Bates CDI-III

Abstract

This paper presents the results of the Basque version of the MacArthur-Bates Communicative Development Inventories-III (KGNZ-III). This instrument is a parental report that covers the range of 30 to 50 months and measures the vocabulary and morphology production, the combination of words, the average length of the three longest sentences computed in morphemes and in words, the sentence grammatical level and some linguistic concepts and use. The normative score are based on data from 1024 toddlers. This article presents the main findings for each scale by age and the percentile tables and the questionnaire are included in the annexes. The results obtained provide predictive and concurrent validity and reliability to the instrument.