Bayley^™-4 is the most comprehensive assessment tool for determining developmental delays in children.

Bayley Scales of Infant and Toddler Development | Fourth Edition

Bayley-4

Nancy Bayley, PhD,Glen P. Aylward, PhD, ABPP

Bayley^™-4 is the most comprehensive assessment tool for determining developmental delays in children.

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Age range:: 16 days to 42 months
Publication date:: September 2019
Qualification level:: B
Completion time:: 30 to 70 minutes (depending upon age of child)
Administration:: Paper-and-pencil; Q-global
Scores/Interpretation:: Subtest level scaled scores, domain level composite scores, percentile ranks, confidence intervals, developmental age equivalents, and growth scale values
Scoring options:: Q-global (web-based); Manual
Other languages:: Simplified Chinese
Telepractice:: Guidance on using this test in your telepractice