What age range is assessed using Bayley Scales of Infant Development III?

What age range is assessed using Bayley Scales of Infant Development III?

• A. 1-42 months
• B. 6-12 months
• C. 2-3 years
• D. 5-6 years

Answer: (A)

The Bayley Scales of Infant Development III are designed to assess development in infants and toddlers across cognitive, language, and motor domains for a specific early-age window. It is standardized for children from 1 month up to 42 months of age (about 3 years and 6 months). This full range is why it is the best choice: it targets the early years when rapid development occurs and stops before preschool age. The other options either cover only a subset of this span or extend beyond the instrument’s upper limit, so they don’t fit the intended range.

The Bayley Scales of Infant Development III are designed to assess development in infants and toddlers across cognitive, language, and motor domains for a specific early-age window. It is standardized for children from 1 month up to 42 months of age (about 3 years and 6 months). This full range is why it is the best choice: it targets the early years when rapid development occurs and stops before preschool age. The other options either cover only a subset of this span or extend beyond the instrument’s upper limit, so they don’t fit the intended range.