Bayley Scales of Infant and Toddler Development - 4th Edition

  • Model: BayleyUK
  • Shipping Weight: 17 kg

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

Purpose: Bayley-4 UK is the most comprehensive assessment tool for determining developmental delays in children.
Age: 16 days to 42 months
Admin: Individual
Time: 30 to 70 minutes (depending upon age of child)
Scores/Interpretation: Subtest level scaled scores, domain level composite scores, percentile ranks, confidence intervals, developmental age equivalents, and growth scale values


Qualification Level: 

Professionals have relied on the Bayley Scales of Infant and Toddler Development™ for more than 50 years to identify potential delays in children and get interventions in place early on.

  • Use caregiver responses to support the scoring of certain items.
  • Determine the need for further in-depth assessment.
  • Administer one or more domain subtests individually.
  • Save significant time through shortened adaptive behaviour content from   Vineland 3.


The new version of the Bayley Scales of Infant and Toddler Development Fourth Edition features:

  • The digital delivery option via Q-global combines the record form and administration manual, which allows greater flexibility, ease of use, and improved accuracy.
  • Content updates are made based on research and user feedback.
  • Updated normative data and clinical studies.

Bayley-4 UK Complete Kit (Print)
Includes Administration Manual (Print), US Technical Manual (Print), Stimulus Book (Print), 25 Cognitive, Language, and Motor Record Forms (Print), 25 Response Booklets (Print), 25 Social-Emotional and Adaptive-Behaviour Questionnaires (Print), 25 Caregiver Reports (Print), Observational Checklist (Print), Manipulative Set (ball puzzle, bank, bell, blocks, blue block set, bottle, buttons sleeve, car, cat puzzle, clear box, 10 coins, comb, connecting block set, 2 crayons, 2 cups, 9 discs, dog puzzle, doll, 3 ducks, ice cream cone puzzle, large ball, memory cards set A and set B, mirror, pegboard, pegs, 2 pencils, pink and blue board, rattle, red block set, ring with string, ring without string, shoelace, small ball, 2 spoons, squeeze toy, stepping path, storybook), Rolling Case.


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