Bayley III Accuracy for Detecting Development Delay

For any of you who use the Bayley Scales of Infant and Toddler Development (Bayley-III), recent research indicated that the scale “seriously underestimates developmental delay in 2 year old Australian children”. The subjects were 221 children who were born extremely pre term (

References: Peter J. Anderson; Cinzia R. De Luca; Esther Hutchinson; Gehan Roberts; Lex W. Doyle; and the Victorian Infant Collaborative Group Underestimation of Developmental Delay by the New Bayley-III Scale Arch Pediatr Adolesc Med. 2010;164(4):352-356.