Bayley Scales of Infant and Toddler Development™, Fourth Edition
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Bayley Scales of Infant and Toddler Development™, Fourth Edition


Age Range: 1 to 42 months

Administration: Paper-and-pencil; Q-global®

Completion Time: 30 to 90 minutes (depending upon age of child)

Scores/Interpretation: Subtest level scaled scores, domain level composite scores, percentile ranks, confidence intervals, developmental age equivalents

Scoring Options: Q-global (web-based); Manual

Publication Date: 2019


Product Details

As an infant grows, we are constantly assessing their cognitive, motor, and language/communication skills to measure their development. Having the right tools to identify potential delays and get interventions in place early on is crucial to their future development.

For over 30 years, professionals like you have relied on the proven Bayley Scales of Infant and Toddler Development, and today, there is even greater reason to do so. The new Bayley-4 is the most comprehensive assessment tool for determining developmental delays in children one month to 42 months old.

NEW! Digital administration, scoring and reporting is available on Q-global, our web-based system that incorporates administration instructions, navigation rules, scoring, and reporting.

What's changed

5 developmental domains



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