A modified version of the Bayley Scales of Infant Development-II for cognitive matching of infants with and without Down syndrome
Article first published online: 28 APR 2008
© 2008 The Authors. Journal Compilation © 2008 Blackwell Publishing Ltd
Journal of Intellectual Disability Research
Volume 52, Issue 6, pages 554–561, June 2008
How to Cite
Moore, D. G., Goodwin, J. E. and Oates, J. M. (2008), A modified version of the Bayley Scales of Infant Development-II for cognitive matching of infants with and without Down syndrome. Journal of Intellectual Disability Research, 52: 554–561. doi: 10.1111/j.1365-2788.2008.01064.x
- Issue published online: 28 APR 2008
- Article first published online: 28 APR 2008
- Accepted 17 March 2008
- Bayley scales;
- Down syndrome;
Background Many measures of infants' early cognitive development, including the BSID-II (The Bayley Scales of Infant Development), mix together test items that assess a number of different developmental domains including language, attention, motor functioning and social abilities, and some items contribute to the assessment of more than one domain. Consequently, the scales may lead to under- or over-estimates of cognitive abilities in some clinical samples and may not be the best measure to use for matching purposes.
Method To address this issue we created a modified form of the BSID-II (the BSID-M) to provide a ‘purer’ assessment of the general cognitive capacities in infants with Down syndrome (DS) from 6 to 18 months of age. We excluded a number of items that implicated language, motor, attentional and social functioning from the original measure. This modified form was administered to 17 infants with Down syndrome when 6, 12 and 18 months old and to 41 typically developing infants at 4, 7 and 10 months old.
Results The results suggested that the modified form continued to provide a meaningful and stable measure of cognitive functioning and revealed that DS infants may score marginally higher in terms of general cognitive abilities when using this modified form than they might when using the standard BSID-II scales.
Conclusions This modified form may be useful for researchers who need a ‘purer’ measure with which to match infants with DS and other infants with intellectual disabilities on cognitive functioning.