Bayley Scales of Infant and Toddler Development™, Fourth Edition (Bayley-4™ Screening Test)

Coming fall 2019

Ages / Grades:

1 - 42 months

Administration Format:


Administration Time:

15 to 25 minutes

Scoring Options:


Scores / Interpretation:

  • Cut scores by age for Cognitive

  • Language

  • and Motor Scales



Coming Fall, 2019!

Get pre-publication pricing on kits!


  • Bayley-4 Screening Test Kit



    Includes: Screening Test Manual (Technical and Administration), Screening Test Stimulus Book, Screening Test Record Forms (pkg of 25), Screening Test Motor-Response Booklets (pkg of 25), Observation Checklist, Screening Manipulative Kit, and bag.
    Note:  the price shown includes a 10% pre-publication discount available until September, 2019 (regular price is $413.00).


  • Bayley-4 Screening Test Administration and Technical Manual


  • Bayley-4 Screening Test Record Form Set



    Screening Test Forms (pkg of 25), and Screening Test Motor-Response Booklets (pkg of 25)

  • Bayley-4 Screening Test Record Form



    (pkg of 25)

  • Bayley-4 Screening Test Motor- Response Booklet



    (pkg of 25)

  • Bayley-4 Screening Test Observation Checklist



  • Bayley-4 Screening Test Manipulative Set and Bag



  • Bayley-4 Screening Test Stimulus Book



Upcoming Live Webinars:

Clinical and Statistical Comparison of the Bayley-III and Bayley-4

Presenter: Glen P Aylward, PhD, ABPP

Changes in the Bayley Scales since its original publication in 1969 include the structure of the scales, differences in overall scores, and more recently, polytomous scoring and selective use of caregiver report.  These changes impact test users both in terms of contemporary diagnostics and longitudinal research application. Given that the Bayley is the international reference standard for developmental assessment in infants and toddlers ages 0-42 months, clarification of these issues is necessary.  This presentation will be followed by a question and answer session.


Date:  Wednesday, July 17, 2019  |  Time:  12:00 - 1:00 PM EDT


Bayley-4 Overview Webinar

This webinar will familiarize participants with the administration, scoring, and interpretation of the Bayley Scales of Infant and Toddler Development – Fourth Edition (Bayley-4).

Participants will learn about the key updates to the fourth edition including the optional digital administration. Administration for items on the Cognitive, Language, and Motor scales of the Bayley-4 will be presented with an emphasis on new items and item modifications. Participants will learn about the new Caregiver Questions and changes to Item Scoring in the fourth edition.

The options for administration of the Bayley-4 Adaptive and Social-Emotional areas will also be described. Lastly, participants will learn about the scores obtained and basic interpretation of the Bayley-4.


Date:  Tuesday, July 23, 2019 | Time:  1:00 - 1:45 PM EDT

Date:  Monday, August 19, 2019 | Time:  12:00 - 12:45 PM EDT

Date:  Tuesday, September 17, 2019 | Time:  1:00 - 2:00 PM EDT


On-demand Recorded Webinar:

Introducing the Bayley-4

Presented by:  Gloria Maccow, PhD

Recorded: February, 2019

» View now (13 minutes)


Speak to a Pearson Assessment Consultant

To provide you with the best possible service and to support your assessment strategy, we have aligned our qualified and knowledgeable Assessment Consultants to meet your needs in your professional area of practice.

»Contact a member of our Assessment Consultant Team

Order Help

Get instructions and help on ordering from our product catalog.

Ordering FAQs

P: 1-866-335-8418

F: 1-800-665-7307