RT Journal
A1 Anderson PJ, De Luca CR, Hutchinson E, Roberts G, Doyle LW
T1 APplication of the flynn effect for the bayley iii scales—reply
JF Archives of Pediatrics & Adolescent Medicine
JO Archives of Pediatrics & Adolescent Medicine
YR 2010
FD November 1
VO 164
IS 11
SP 1072
OP 1073
DO 10.1001/archpediatrics.2010.200
UL http://dx.doi.org/10.1001/archpediatrics.2010.200
AB 
We appreciate the interest in our article1 shown by Robertson et al. While the age at assessment with the Bayley-III differed between our study1 (24-month corrected age) and that of Robertson et al (18-month corrected age), their small study supports our conclusion that the new Bayley-III underestimates developmental delay, at least for the cognitive domain. The strength of the Robertson et al study is that both the BSID-II and Bayley-III were administered to their sample of 40 extremely preterm children. Based on the BSID-II, 20% of their sample had moderate to severe cognitive delay, a rate consistent with the extensive literature on this at-risk population. In contrast, with the Bayley-III, no child exhibited moderate to severe cognitive delay but 18% exhibited language delay.