One of the most popular and widely used parent report instruments for assessing early language acquisition is the MacArthur-Bates Communicative Development Inventories (MB-CDI). This study compares normative data of the Italian Words and Sentences complete form (WS-CF) and short form (WS-SF). The samples included 752 children for the WS-CF and 816 children for the WS-SF designed for children aged 18-36 months. The concordance between WS-SF and WS-CF is analyzed in a subgroup of 65 children. The results revealed strong correlations between WS-CF and WS-SF in both lexical and grammar skills as well as strong relationship between lexical and grammar skills. There was a high percentage agreement (97%) between the two forms for scores below the 10th percentile, suggesting that the two forms may be used interchangeably in order to describe vocabulary and grammatical development.
The Italian Words and Sentences MB-CDI: normative data and concordance between complete and short forms
Cambridge University Press,, London , Regno Unito
Journal of child language (Print) 46 (2019): 546–566. doi:10.1017/S0305000919000011
info:cnr-pdr/source/autori:Rinaldi, Pasquale; Pasqualetti, Patrizio; Stefanini, Silvia; Bello, Arianna; Caselli, Maria Cristina/titolo:The Italian Words and Sentences MB-CDI: normative data and concordance between complete and short forms/doi:10.1017/S030