Pediatric Physical Therapy

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Pediatric Physical Therapy:
doi: 10.1097/PEP.0000000000000004
Research Article

Accommodating the Bayley-III for Motor and/or Visual Impairment: A Comparative Pilot Study

Visser, Linda MSc; Ruiter, Selma A.J. PhD; van der Meulen, Bieuwe F. PhD; Ruijssenaars, Wied A.J.J.M. PhD; Timmerman, Marieke E. PhD

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Purpose: This study assessed the validity and usefulness of the Bayley Scales of Infant and Toddler Development, Third Edition (Bayley-III) Low Motor/Vision accommodated version. Accommodations are adaptations to minimize impairment bias, without altering what the test measures. Of the items, 66% have Low Motor accommodations like enlarged materials; 62% have Low Vision accommodations.

Methods: Using a within-subject design, we tested 19 children with the accommodated and standard Bayley-III, in a randomly counterbalanced order. The children had motor and/or visual impairment and a chronological age between 22 and 90 months. The test administrators completed an evaluation form.

Results: A subgroup of children benefited from the accommodations; 2 children obtained a large raw score difference. Test administrators considered the accommodations as practical, and advantageous for most children.

Conclusion: The Low Motor/Vision accommodated version seems to validly assess the development of this population. Future, larger-scale research should study whether the accommodations improve the construct validity of the Bayley-III.

© 2014 Wolters Kluwer Health | Lippincott Williams & Wilkins and the Section on Pediatrics of the American Physical Therapy Association.


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