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Bayley Scales of Infant and Toddler Development

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Bayley; BSID-III

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The Bayley Scales of Infant and Toddler Development-Third Edition (BSID-III; 2006) is considered to be the reference standard for developmental assessment. It is an individually administered test, applicable from 1 to 42 months of age. The primary purpose of the BSID-III is to identify children with developmental delay and to provide information for interventions.

The BSID-III was normed on 1700 children (divided into 17 age groups) and development is assessed across five domains: Cognitive (91 items), Language (49 receptive and 48 expressive), Motor (66 fine motor and 72 gross motor), Social-Emotional, and Adaptive. Like its predecessors, the BSID-III is a modified power test. Assessment of the first three domains is accomplished by item administration, while the latter two are completed using caregiver response to a questionnaire. A Behavior Observation Inventory can be completed by both the examiner and the caregiver and allows assessment of the...

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References and Readings

  • Aylward, G. P. (2013). Continuing issues with the Bayley-III: Where to go from here. Journal of Developmental and Behavioral Pediatrics, 9, 697–701.

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  • Bayley, N. (1969). The Bayley scales of infant development. San Antonio: The Psychological Corporation.

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  • Bayley, N. (1993). The Bayley scales of infant development (2nd ed.). San Antonio: The Psychological Corporation.

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  • Bayley, N. (2006). Bayley scales of infant and toddler development (3rd ed.). San Antonio: The Psychological Corporation.

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  • Greenspan, S. I. (2004). Greenspan social-emotional growth chart. A screening questionnaire for infants and young children. San Antonio: Harcourt Assessment.

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  • Harrison, P. L., & Oakland, T. (2003). Adaptive behavior assessment system (2nd ed.). San Antonio: The Psychological Corporation.

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  • Weiss, L. G., Oakland, T., & Aylward, G. P. (Eds.). (2010). Bayley III: Clinical use and interpretation. Boston: Elsevier.

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Correspondence to Glen P. Aylward .

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Aylward, G.P. (2017). Bayley Scales of Infant and Toddler Development. In: Kreutzer, J., DeLuca, J., Caplan, B. (eds) Encyclopedia of Clinical Neuropsychology. Springer, Cham. https://doi.org/10.1007/978-3-319-56782-2_1522-2

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  • DOI: https://doi.org/10.1007/978-3-319-56782-2_1522-2

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-56782-2

  • Online ISBN: 978-3-319-56782-2

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