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Bayley Scales of Infant and Toddler Development | Fourth Edition

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. Guidance on using this test in your telepractice.

Choose from our formats

  • Kits

    Starter & complete kits, print & digital

    5 options

    From USD 414.35
    From USD 414.35
  • Test forms reports

    Booklets, record forms, answer sheets, report usages & subscriptions

    15 options

    From USD 0.00
    From USD 0.00
  • Support materials

    Manuals, stimulus books, replacement items & other materials

    19 options

    From USD 2.07
    From USD 2.07
  • Training

    Onsite, virtual & on-demand trainings

    3 options

    From USD 234.57
    From USD 234.57
  • All products

    All tests and materials offered for Bayley-4

    42 options

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    - of 70 results
    • Bayley Coffee Cup Tan
      0154028789 Qualification Level B

      USD 12.54

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      Estimated to ship:3-4 weeks
    • Bayley-4 Caregiver Report Forms Qty 25 (Print)
      A102001600051 Qualification Level B

      USD 112.36

      text.product.itembackinstockonpurchaseinfo

      Estimated to ship:3-4 weeks
    • Bayley-4 Cat Puzzle
      A103000166022 Qualification Level B

      USD 28.29

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    • Bayley-4 Administration Manual (Print)
      A102001600043 Qualification Level B

      USD 288.08

      text.product.itembackinstockonpurchaseinfo

      Estimated to ship:3-4 weeks
    • Bayley-4 Cognitive Language Motor Q-global Administration/Report Qty 1 (Digital)
      A102001600065 Qualification Level B

      USD 7.36

      1-49 USD 7.36
      50-99 USD 7.02
      100-249 USD 6.67
      250+ USD 6.33
      Savings are estimated

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    • Bayley-4 Cognitive Language Motor Record Forms Qty 25 (Print) and Motor Response Booklets Qty 25 (Print)
      A102001600093 Qualification Level B

      USD 203.78

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      Estimated to ship:1-2 weeks
    • Bayley-4 Bell with Plastic Handle
      0154028460 Qualification Level B

      USD 12.54

      text.product.itembackinstockonpurchaseinfo

      Estimated to ship:3-4 weeks
    • Bayley-4 Bank
      A102001600087 Qualification Level B

      USD 7.25

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      Estimated to ship:3-4 weeks
    • BAYLEY-4 Cognitive Language and Motor Record Form Single (Print)
      A103000232321 Qualification Level B

      USD 0.00

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    • Bayley-4 Cognitive Record Forms Qty 25 (Print)
      A102001600048 Qualification Level B

      USD 91.54

      text.product.itembackinstockonpurchaseinfo

      Estimated to ship:3-4 weeks
    • BAYLEY-4 Complete Kit / Screener Kit Manipulatives Label 2
      A102001600080 Qualification Level B

      BAYLEY-4 COMPLETE KIT / SCREENER KIT MANIPULATIVES LABEL 2

      USD 1.61

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    • Bayley-4 Cognitive Language Motor Record Forms Qty 25 (Print)
      A102001600046 Qualification Level B

      USD 168.59

      text.product.itembackinstockonpurchaseinfo

    • Bayley-4 Complete Kit (Digital)
      A102001600062 Qualification Level B

      Includes Administration Manual (Digital), Technical Manual (Digital), 25 Q-Global usages for on-screen administration, scoring and reporting of Cognitive, Language, Motor, Social-Emotional and Adaptive-Behavior domains (Digital), 25 Motor-Response Booklets (Print), Stimulus Book (Print), Complete Kit 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 disks, 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, Introductory Online Training. Once ordered, the digital assets are accessible by logging into Q-global and visiting the Q-global Resource Library. They are view-only digital files.

      USD 1,438.88

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    • Bayley-4 Coins Qty 10
      A102001600086 Qualification Level B

      USD 7.25

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    • Bayley-4 Complete Kit Manipulatives Set 3
      A102001600079 Qualification Level B

      Includes 9 blue blocks, cat puzzle, 2 cups, doll, 3 ducks, memory cards set A and set B, 16 pegs, 3 red blocks set, spoon

      USD 210.80

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    • Bayley-4 Complete/Screening Kits Manipulatives Set 1
      A102001600077 Qualification Level B

      Includes bank, bell, connecting block set, 12 cubes, large 4-inch ball, small 2-inch ball, oval shoe lace, 2 pencils, plastic bottle without lid, rattle, 2 red crayons, ring with string, ring without string, 10 coins, 4 red blocks with hole, stepping path, story book

      USD 210.80

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    • Bayley-4 Complete Kit (Print)
      A102001600041 Qualification Level B

      Includes Administration Manual (Print), Technical Manual (Print), Stimulus Book (Print), 25 Cognitive, Language, and Motor Record Forms (Print), 25 Motor-Response Booklets (Print), 25 Social-Emotional and Adaptive-Behavior 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 disks, 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, Introductory Online Training

      USD 1,600.23

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    • Bayley-4 Ducks Qty 3
      A102001600074 Qualification Level B

      USD 35.31

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    • Bayley-4 Complete Kit (Print) / Bayley-4 Screening Test Complete Kit (Print) Combo
      A102001600042 Qualification Level B

      Includes Bayley-4 Complete Kit [Administration Manual (Print), Technical Manual (Print), Stimulus Book (Print), 25 Cognitive, Language, and Motor Record Forms (Print), 25 Motor-Response Booklets, 25 Social-Emotional and Adaptive-Behavior Questionnaires (Print), 25 Caregiver Reports (Print), Observational Checklist (Print), Complete Kit 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 disks, 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, Introductory Online Training] and Bayley-4 Screening Test Kit [Bayley-4 Screening Test Manual (Print), Screening Test Stimulus Book (Print), 25 Screening Test Record Forms (Print), Observation Checklist (Print), Screening Kit Manipulative Set (bank, bell, blocks, blue block set, bottle, cat puzzle, 10 coins, connecting block set, 2 crayons, 2 cups, doll, ducks, large ball, memory cards set A and set B, pegboard), Bag]

      USD 1,810.79

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      Estimated to ship:More than 12 weeks
    • Bayley-4 Cubes Red Qty 12
      A102001600088 Qualification Level B

      USD 28.29

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    • Bayley-4 Complete Kit Manipulative Set and Rolling Bag
      A102001600060 Qualification Level B

      Includes 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 disks, 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 bag

      USD 589.72

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    • Bayley-4 Complete/Screening Kits Manipulatives Set 2
      A102001600078 Qualification Level B

      Includes ball puzzle, button sleeve, car, clear box with open end, comb, 6 large disks, 3 small disks, dog puzzle, ice cream cone puzzle, mirror, squeeze toy

      USD 210.80

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    • BAYLEY-4 Complete Kit / Screener Kit Manipulatives Label 3
      A102001600081 Qualification Level B

      USD 1.61

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    • BAYLEY-4 Luggage Tag
      A102001600075 Qualification Level B

      USD 7.25

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    • Bayley-4 Motor Response Booklets Qty 25 (Print)
      A102001600056 Qualification Level B

      USD 42.32

      text.product.itembackinstockonpurchaseinfo

      Estimated to ship:3-4 weeks
    • Bayley-4 Motor Scale Kit (Print)
      A103000179713 Qualification Level B

      Includes Administration Manual (Print), Technical Manual (Print), 25 Motor Record Forms (Print), 25 Motor-Response Booklets (Print), Motor Scale Manipulative Set (bank, bell, blocks, blocks with holes, bottle, button sleeve, coins, connecting block set, crayon, pegboard, pencil, rattle, ring with string, ring without string, shoelace, small ball, storybook, stepping path), Bag, Introductory Online Training

      USD 667.00

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    • Bayley-4 Language Record Forms Qty 25 (Print)
      A102001600049 Qualification Level B

      USD 91.54

      text.product.itembackinstockonpurchaseinfo

      Estimated to ship:3-4 weeks
    • Bayley-4 Memory Cards Set A Qty 3 (Print)
      A102001600073 Qualification Level B

      USD 28.29

      text.product.itembackinstockonpurchaseinfo

    • BAYLEY-4 Motor Scale Kit Luggage Tag
      A103000179907 Qualification Level B

      USD 0.00

      text.product.itembackinstockonpurchaseinfo

    • Bayley-4 Large Disks Qty 6
      A102001600091 Qualification Level B

      USD 28.29

      text.product.itembackinstockonpurchaseinfo

    • BAYLEY-4 Introductory Training Welcome Letter
      A103000167371 Qualification Level B

      USD 0.00

      text.product.itembackinstockonpurchaseinfo

    • Bayley-4 Motor Record Forms Qty 25 (Print)
      A102001600050 Qualification Level B

      USD 84.30

      text.product.itembackinstockonpurchaseinfo

      Estimated to ship:3-4 weeks
    • Bayley-4 Observation Checklist Qty 1 (Print)
      A102001600058 Qualification Level B

      Includes a laminated form for re-use

      USD 14.26

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    • Bayley-4 Plastic Bottle without Lid 33Mm
      A102001600085 Qualification Level B

      USD 7.25

      text.product.itembackinstockonpurchaseinfo

    • Bayley-4 Puzzles Qty 3
      A102001600072 Qualification Level B

      USD 56.35

      text.product.itembackinstockonpurchaseinfo

    • Bayley-4 Memory Cards Set B Qty 6 (Print)
      A102001600083 Qualification Level B

      Includes 3 pairs of cards

      USD 28.29

      text.product.itembackinstockonpurchaseinfo

    • Bayley-4 Q-global Cognitive, Language, Motor 1 Year Subscription
      A103000166016 Qualification Level B

      USD 57.50

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    • Bayley-4 Q-global Social-Emotional and Adaptive-Behavior 1 Year Subscription
      A103000166013 Qualification Level B

      USD 57.50

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    • Bayley-4 Q-global Administration Manual (Digital)
      A102001600063 Qualification Level B

      Once ordered, the digital asset is accessible by logging into Q-global and visiting the Q-global Resource Library. It is a view-only digital file.

      USD 285.32

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    • Bayley-4 Screening Test Observation Checklist Qty 1 (Print)
      A102001600059 Qualification Level B

      Includes a laminated form for re-use

      USD 14.26

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    • Bayley-4 Q-global Administration Manual and Item Presentation Summary (Digital)
      A103000232623 Qualification Level B

      USD 241.73

      text.product.itembackinstockonpurchaseinfo

    • Bayley-4 Screening Test Administration and Technical Manual (Print)
      A102001600054 Qualification Level B

      USD 105.46

      text.product.itembackinstockonpurchaseinfo

    • Bayley-4 Q-global Scoring Subscription 1 Year (Digital)
      A103000166050 Qualification Level B

      Includes unlimited scoring per user within an account, for assessments administered using paper record forms.

      USD 57.50

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    • Bayley-4 Q-global Technical Manual (Digital)
      A102001600064 Qualification Level B

      Once ordered, the digital asset is accessible by logging into Q-global and visiting the Q-global Resource Library. It is a view-only digital file.

      USD 285.32

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    • Bayley-4 Social-Emotional and Adaptive Behavior Q-global Administration/Report Qty 1 (Digital)
      A102001600066 Qualification Level B

      USD 5.52

      1-49 USD 5.52
      50-99 USD 5.29
      100-249 USD 4.95
      250+ USD 4.72
      Savings are estimated

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    • Bayley-4 Screening Test Kit (Print)
      A102001600052 Qualification Level B

      Includes Screening Test Manual (Print), Screening Test Stimulus Book (Print), 25 Screening Test Record Forms (Print), Observation Checklist (Print), Screening Kit Manipulative Set (bank, bell, blocks, blue block set, bottle, cat puzzle, 10 coins, connecting block set, 2 crayons, 2 cups, doll, ducks, large ball, memory cards set A and set B, pegboard), Bag

      USD 414.35

      text.product.itembackinstockonpurchaseinfo

      Estimated to ship:1-2 weeks
    • Bayley-4 Screening Test Stimulus Book (Print)
      A102001600055 Qualification Level B

      USD 203.78

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    • Bayley-4 Screening Test Luggage Tag
      A102001600095 Qualification Level B

      USD 7.25

      text.product.itembackinstockonpurchaseinfo

    • Bayley-4 Small Disks Qty 3
      A102001600071 Qualification Level B

      USD 21.16

      text.product.itembackinstockonpurchaseinfo

      Estimated to ship:3-4 weeks
    • Bayley-4 Social-Emotional and Adaptive Behavior Scales Questionnaires Qty 25 (Print)
      A102001600047 Qualification Level B

      USD 154.56

      text.product.itembackinstockonpurchaseinfo

      Estimated to ship:3-4 weeks
    • Bayley-4 Stepping Path
      A102001600090 Qualification Level B

      USD 35.31

      text.product.itembackinstockonpurchaseinfo

      Estimated to ship:3-4 weeks
    • Bayley-4 Stimulus Book (Print)
      A102001600045 Qualification Level B

      USD 449.19

      text.product.itembackinstockonpurchaseinfo

      Estimated to ship:3-4 weeks
    • Bayley-4 Technical Manual (Print)
      A102001600044 Qualification Level B

      USD 288.08

      text.product.itembackinstockonpurchaseinfo

    • Bayley-4/III Blocks Qty 6
      0154027340 Qualification Level B

      Includes 4 small blocks; 2 medium blocks

      USD 40.37

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    • Bayley-4/III Ball 4 Inch
      0154027308 Qualification Level B

      USD 18.86

      text.product.itembackinstockonpurchaseinfo

      Estimated to ship:3-4 weeks
    • Bayley-4/III Oval Shoe Lace
      0154027405 Qualification Level B

      USD 2.07

      text.product.itembackinstockonpurchaseinfo

      Estimated to ship:3-4 weeks
    • Bayley-4/III Mirror 5X7
      0154027391 Qualification Level B

      USD 21.39

      text.product.itembackinstockonpurchaseinfo

      Estimated to ship:3-4 weeks
    • Bayley-4/III Blue Block Set Qty 9
      0154027596 Qualification Level B

      Includes 4 circles and 5 squares

      USD 31.86

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      Estimated to ship:3-4 weeks
    • Bayley-4/III Doll
      015402855X Qualification Level B

      USD 9.55

      text.product.itembackinstockonpurchaseinfo

      Estimated to ship:3-4 weeks
    • Bayley-4/III Button Sleeve
      0154028347 Qualification Level B

      USD 11.85

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      Estimated to ship:3-4 weeks
    • Bayley-4 Screening Test Record Forms Qty 25 (Print)
      A102001600053 Qualification Level B

      USD 63.48

      text.product.itembackinstockonpurchaseinfo

      Estimated to ship:1-2 weeks
    • Bayley-4/III Two Rings with A String Set
      0154028576 Qualification Level B

      USD 11.85

      text.product.itembackinstockonpurchaseinfo

      Estimated to ship:3-4 weeks
    • Bayley-4/III Red Blocks Qty 3
      0154027588 Qualification Level B

      USD 11.85

      text.product.itembackinstockonpurchaseinfo

      Estimated to ship:3-4 weeks
    • Bayley-4/III Peg Set Qty 16
      0154027553 Qualification Level B

      Includes 8 yellow pegs; 4 red pegs; 4 blue pegs

      USD 15.64

      text.product.itembackinstockonpurchaseinfo

      Estimated to ship:3-4 weeks
    • Bayley-4/III Storybook
      0154027480 Qualification Level B

      USD 11.85

      text.product.itembackinstockonpurchaseinfo

      Estimated to ship:3-4 weeks
    • Bayley-4/III Red Blocks with Hole Qty 4
      0154027618 Qualification Level B

      USD 40.37

      text.product.itembackinstockonpurchaseinfo

      Estimated to ship:3-4 weeks
    • BAYLEY-4COMP/SCRNR MANIP LBL1
      A102001600076 Qualification Level B

      BAYLEY-4 COMPLETE KIT / SCREENER KIT MANIPULATIVES LABEL 1

      USD 1.61

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    • Bayley-4: Administration, Scoring & Basic Interpretation, US Edition · On Demand · 12 Hours
      A103000314685 Qualification Level B

      This on-demand training is designed for individuals who conduct infant-toddler assessments for early intervention or early childhood assessments for school districts and preschool programs. The training provides detailed guidance for the administration, scoring, and interpretation of the Bayley-4. This program consists of six modules, and includes recordings of full administration of each subtest.

      USD 234.57

      text.product.itembackinstockonpurchaseinfo

      View full training details
    • Bayley-4 Mastery Accreditation · Live Online · 12 Hours
      A103000251819 Qualification Level B

      This live-online, two-day training focusses on the Bayley Scales of Infant and Toddler Development, which is used to identify deficits in very young children across five major developmental domains: cognitive, language, motor, adaptive behaviour and social-emotional. This scale is ideal for use when delays or problems in early development are suspected to determine whether early intervention or further assessment are required. It indicates strengths, weaknesses, and competencies so that parents and professionals can properly plan for the child.

      Below are the dates available for this training. We'll be in contact to secure your preferred date.

      • 5 – 6 December 2024
      • 13 – 14 February 2025
      • 3 – 4 April 2025
      • 29 – 30 May 2025
      • 31 July – 1 August 2025
      • 18 – 19 September 2025
      • 6 – 7 November 2025
      • 4 – 5 December 2025

      USD 783.61

      1-3 USD 783.61
      4-5 USD 705.25
      6+ USD 626.89
      Savings are estimated

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      View full training details
    • User Level B Training (Child Development) · On Demand
      A103000360923 Qualification Level A

      This on demand training is designed to support and upskill User Level A nurses, hospital staff, early learning educators, social workers, Allied Health professionals, special educators and other professionals working in the Health and Early Learning industry to help screen, assess and understand an individual's skills to by accessing and using User Level B assessments. This training focuses on the Bayley 4.

      USD 500.00

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      View full training details
    - of 70 results

    Overview

    Publication date:
    September 2019

    Age range:

    16 days to 42 months

    Scores/Interpretation:

    Subtest level scaled scores, domain level composite scores, percentile ranks, confidence intervals, developmental age equivalents, and growth scale values

    Qualification level:

    B

    Qualification Level

     

    Level A

    This approval level enables you to buy our assessments that require no professional degree, accreditation, organization membership, or license/certificate.

    Level B

    This approval level enables you to buy our assessments requiring A or B qualification levels.

    Level C

    This approval level enables you to buy all our assessments.

    Completion time:

    30 to 70 minutes (depending upon age of child)

    Administration:

    Paper-and-pencil; Q-global

    Scoring options:

    Q-global (web-based); Manual

    Other languages:
    Simplified Chinese

    Telepractice:
    Guidance on using this test in your telepractice

    Interested in training for this assessment?

    Please reach out via link below

    Contact us

    Product Details

    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.

    Benefits

    • 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 behavior content from Vineland 3.

    Features

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

    • 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 made based on research and user feedback.
    • Updated normative data and clinical studies.
    • Includes complimentary Introductory Online Training

    Five developmental domains

    Telepractice

    Find out how to use this test in your telepractice.

    Learn more


     

    Sample Reports

    The following sample reports are available for Bayley-4.

    		 

    Resources

    Resources

    The following resources are available.

    		 

    FAQs

    Kits, components, and pricing

    If I have a Bayley-III kit, can I upgrade to Bayley-4? If so, what are the options?

    Materials are available to purchase separately; however, it is more expensive to upgrade this way than to purchase a new kit, i.e. the items required to upgrade would be:

    • Bayley-4 Administration Manual (paper or digital)
    • Bayley-4 Technical Manual (paper or digital)
    • Bayley-4 Stimulus Book (paper)
    • New Manipulatives (small set of disks (3); cat puzzle; memory cards; ducks; pennies and penny bank; large disks (6); small car)
    • For manual administration and scoring:
      • Cognitive, Language, and Motor Forms, and Motor Response Booklets (pkg of 25 of each)
      • Social-Emotional & Adaptive Behavior Record Forms (pkg 25)
      • Caregiver Report (pkg of 25)
    • For digital administration and scoring:
      • Q-global: Cognitive, Language and Motor administration, scoring & report and Motor Response Booklets
      • Q-global: Social-Emotional & Adaptive Behavior administration, scoring and report

    What is the difference between Bayley-4 Q global Scoring Subscriptions and Bayley-4 Q global Reports?

    The Scoring-Subscriptions provide a digital scoring option for paper-based administration. They allow manual entry of raw data to generate scores and reports.

    The Cognitive, Language and Motor Administration, Scoring and Report is used for the on-screen administration of these domains, and is a digital version of the Cognitive, Language, and Motor Record Form. This is for the Examiner to use and complete.

    The Social-Emotional & Adaptive Behavior Administration, Scoring and Report is a digital equivalent of the Social-Emotional & Adaptive Behavior record form. This is a caregiver questionnaire which can be emailed to the caregiver with a secure link to complete or can be completed within your office on an internet enabled device.

    Content

    How do the integrated caregiver questions contribute to the scoring of an item?

    For certain questions a caregiver response is possible for scoring the item, see the example below:

    Ask caregiver, "When you say the name of a familiar object, does [insert child's name] look at the object you named often, not often, or not at all?"

    Score
    2 points, Often
    1 point, Not often
    0 points, Not at all

    For those items for which a structured/observation score and a Caregiver Question score can be obtained, is it recommended to ask the caregiver question in every instance where mastery (i.e. a score of 2) is not assigned based on the structured item administration or observation? 

    The Caregiver Question should not be used in every item where it is an option or where a score of '2' is not assigned. The intent of the caregiver questions is not to optimize scores as much as possible. Rather, they are to be used when a response is ambiguous, the child is not cooperative, or if the behavior may have a greater likelihood of occurring in familiar surroundings. Frequent discrepancies between what is observed during testing and the caregiver question responses raises questions regarding the validity of Caregiver Question scores, and clinical judgement should guide interpretation.  

    Is the Bayley-4 available in Spanish?
    Bayley-4 is not currently available in Spanish.
    At what age is prematurity considered for Bayley-4?

    Prematurity is considered 36 weeks 6 days or less gestation. This is what is meant by "36 weeks or less gestation" on page 27 of the Bayley-4 administration manual.

    Digital Administration and Scoring

    Can you log in to the digital scoring and save the score report so that another discipline can enter and score their section for the same kid?

    This is possible and depends on how the account is set up. Some Q-global users intentionally set up their accounts so that all their team members can view their examinees as a group (rather than just the ones they have entered). Of course, an account can also be setup so that users can only see their own examinees. This is a choice made when the account is set up.

    If an account is set-up so that it is in the same hierarchy as other accounts, then the examinee record can be moved from one account to another for other disciplines to enter and score their section. Examinee records cannot be moved to an account within a separate entity / hierarchy.

    Is there any data on differences between administration using paper vs. digital formats?

    The digital administration of Bayley-4 is a digital record form, the child does not interact with the administration device (e.g. tablet/laptop), the administration guidelines between paper and digital are the same.

    As part of the Bayley-4 validation we conducted a study comparing performance on Bayley-III (paper scoring) and Bayley-4 (digital scoring). The data indicates that the children's performance on the two tests are similar (no significant difference).

    How do I administer Bayley-4 digitally?

    The digital administration uses Q-global and combines the record form and administration manual for more streamlined administration. It is optimized for the screen-size of a tablet (e.g. iPad) or larger. Although it will work on a smart phone it will not be a good user experience. Q-global can be used on any device that has internet. You cannot use Q-global without internet access.

    The Social-Emotional & Adaptive Behavior questionnaires can be administered remotely via a secure email link.

    Will the program be able to let the examiner know when you should stop correcting age for premature babies?

    It is recommended to adjust for prematurity up to 24 chronological months, however, the platform will allow you to adjust beyond this age. There is on-screen text advising the recommended ages for adjusting.

    Can you pull up the original eval and add to it for re-evals?

    Growth Scale Values are included in Bayley-4. These are useful for re-evaluation purposes and are available for both paper and digital administration.

    For paper administration statistical significance is also available to evaluate change in Growth Score Values between two administrations.

    What happens if your internet connection drops during administration?
    Information is continually backed up in Q-global, if a connection drops during administration then any data entered will have been saved. Once you're able to reconnect, the session will continue from where you left off.
    Is offline administration available?
    Offline administration is not available currently. The back-up option is to use paper administration, and enter the scores manually, a subscription version of Bayley-4 on Q-global to facilitate this.
    Can Bayley-4 be administered remotely via telepractice?
    The Social-Emotional & Adaptive Behavior Questionnaire can be administered remotely. Guidance to support telepractice administration of Bayley-4, including the Cognitive, Language and Motor scales is available here

    Psychometrics 

    How are growth scale values reported?

    Growth scale values (GSVs) provide a score metric that does not involve age-based comparisons. Their purpose is for tracking performance across repeated test administrations. If a raw score increases upon a repeat administration, the GSV also increases.

    The GSVs have a mean of 500 and a SD of 25. Because of their construction, GSVs cannot be meaningfully compared between subtests or subdomains. GSVs enable the measurement of an individual child's progress or improvement in an absolute sense. Although the normative scaled scores provide information about a child relative to his or her peers at a given time and may show little change over time, the GSV can provide an ability to estimate independent of one's peers and can track growth over time.

    Do the Bayley-4 norms account for children from culturally and linguistically diverse backgrounds?

    The normative sample was aligned with the latest US census data and included children from culturally and linguistically diverse backgrounds including bilingual children.

    What scores are available?

    View the Bayley-4 score types

    A Social-Emotional Age Equivalent table is also available in the Q-global Resource Library. For those without access to Q-global, please contact customer support to request a cop

    Training 

    How do you access complimentary training with new kit purchases?

    Please see the welcome letter provided with your kit. Alternately, for digital users, details are available in the Q-global resource library for Bayley-4. You can also view training options under the training tab on the Bayley-4 webpage.

    		 

     

    Other languages

    Bayley-4 in Simplified Chinese

    If you are interested in Bayley-4 in Simplified Chinese language please reach out to our partners

    Program items

    Bayley-4 Complete Kit (Print); Bayley-4 Consumable Combos Pack

    Explore Bayley-4 Simplified Chinese

    Related Items

    Bayley Scales of Infant and Toddler Development | Third Edition

    Autism Assessment and Diagnosis Online Course (Annie’s Centre)

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