Usefulness of the Bayley scales of infant and toddler development,third edition, in the early diagnosis of language disorder.

Background: Language disorder (LD) is a neurodevelopmental disorder, and early diagnosis has an impact on speech therapy practice. The aim of this work is to test the usefulness of the Cognitive and Language scales of the Bayley-III in the early diagnosis of LD.

Method: In a longitudinal study, a clinical sample of 187 children with diagnostic hypothesis of communication disorders at 4.