BSID-III
Also written as: BSID-III — Bayley Scales of Infant and Toddler Development, Third Edition
A comprehensive assessment tool used to evaluate cognitive, language, and motor development in children aged 1-42 months.
Full Definition
The Bayley Scales of Infant and Toddler Development, Third Edition (BSID-III) is the gold standard assessment for measuring developmental functioning in infants and toddlers. The assessment includes five scales: cognitive, receptive communication, expressive communication, fine motor, and gross motor. Results are reported as composite scores with a mean of 100 and standard deviation of 15. Scores below 85 typically indicate developmental delay. The assessment requires specialized training to administer and is commonly used in early intervention programs, clinical settings, and research.
Usage
Usage note: Use Roman numeral III, not the number 3. Capitalize all letters in the acronym.
In Context
- "BSID-III assessment revealed cognitive composite score of 82, indicating mild delay." — Psychological evaluation report
- "The child will undergo BSID-III testing to determine eligibility for early intervention services." — Referral documentation