text.skipToContent text.skipToNavigation

Bayley Scales of Infant and Toddler Development | Fourth Edition

(Bayley-4)

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

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

Pricing & Ordering

  • Bayley-4 Complete Kit - Digital

    A102001600062

    Digital Administration Manual, digital Technical Manual; 25 Q-Global usages for on-screen administration, scoring & reporting of Cognitive, Language, Motor, Social-Emotional & Adaptive-Behavior domains, 25 Motor-Response Booklets; Stimulus Book, Manipulative Set, Rolling Case, Introductory Online Training.

    Pricing and Qualification

    Price: $1,025.00

    Qualification Level B

    Ordering

    In stock

  • Bayley-4 Administration Manual - Digital

    A102001600063

    Pricing and Qualification

    Price: $205.00

    Qualification Level B

    Ordering

    In stock

  • Bayley-4 Technical Manual - Digital

    A102001600064

    Pricing and Qualification

    Price: $205.00

    Qualification Level B

    Ordering

    In stock

  • Bayley-4 Motor-Response Booklet

    A102001600056

    Package of 25

    Pricing and Qualification

    Price: $30.00

    Qualification Level B

    Ordering

    In stock

  • Bayley-4 Q-Global: Social-Emotional & Adaptive-Behavior administration, scoring and report

    A102001600066

    Pricing and Qualification

    Price: $4.50

    Qualification Level B

    Tiered pricing discounts
    Quantity Price each
    1-249 $4.50
    250-499 $4.25
    500+ $4.05

    Ordering

    In stock

  • Bayley-4 Q-Global: Cognitive, Language and Motor administration, scoring & report

    A102001600065

    Pricing and Qualification

    Price: $6.00

    Qualification Level B

    Tiered pricing discounts
    Quantity Price each
    1-249 $6.00
    250-499 $5.70
    500+ $5.40

    Ordering

    In stock

  • Bayley-4 Complete Manipulative Set and Rolling Bag

    A102001600060

    Pricing and Qualification

    Price: $420.00

    Qualification Level B

    Ordering

    In stock

  • Bayley-4 Stimulus Book

    A102001600045

    Pricing and Qualification

    Price: $320.00

    Qualification Level B

    Ordering

    In stock

  • Bayley-4 Q-Global Scoring 1-Year Subscription

    A103000166050

    Pricing and Qualification

    Price: $40.00

    Qualification Level B

    Ordering

    In stock

  • Bayley-4 Q-Global Scoring 3-Year Subscription

    A103000166051

    Pricing and Qualification

    Price: $110.00

    Qualification Level B

    Ordering

    In stock

  • Bayley-4 Q-Global Scoring 5-Year Subscription

    A103000166052

    Pricing and Qualification

    Price: $165.00

    Qualification Level B

    Ordering

    In stock

  • Bayley-4 Complete Kit

    A102001600041

    Administration Manual, Technical Manual, 25 Cognitive, Language, and Motor Record Forms, 25 Motor-Response Booklets, 25 Social-Emotional and Adaptive-Behavior Questionnaires, 25 Caregiver Reports, Stimulus Book, Observational Checklist, Manipulative Set, Rolling Case, Introductory Online Training.

    Pricing and Qualification

    Price: $1,140.00

    Qualification Level B

    Ordering

    In stock

  • Bayley-4 Motor Scale Kit

    A103000179713

    Administration Manual, Technical Manual, 25 Motor Record Forms, 25 Motor-Response Booklets, Motor Scale Manipulative Set, Bag, Introductory Online Training

    Pricing and Qualification

    Price: $475.00

    Qualification Level B

    Ordering

    In stock

  • Bayley-4 Complete Kit and Screening Test Combination Kit

    A102001600042

    Includes Administration Manual, Technical Manual, 25 Cognitive, Language, and Motor Record Forms, 25 Motor-Response Booklets, 25 Social-Emotional and Adaptive-Behavior Questionnaires, 25 Caregiver Reports, Stimulus Book, Observational Checklist, Manipulative Set, Rolling Case, Introductory Online Training. Screening Test Manual (Technical and Administration), Screening Test Stimulus Book, 25 Screening Test Record Forms, Observation Checklist, Screening Manipulative Kit, Bag.

    Pricing and Qualification

    Price: $1,161.00

    Qualification Level B

    Ordering

    In stock

  • Bayley-4 Administration Manual

    A102001600043

    Pricing and Qualification

    Price: $205.00

    Qualification Level B

    Ordering

    In stock

  • Bayley-4 Technical Manual

    A102001600044

    Pricing and Qualification

    Price: $205.00

    Qualification Level B

    Ordering

    In stock

  • Bayley-4 Record Forms for Cognitive, Language and Motor Administration

    A102001600093

    Package of 25 Cognitive, Language, and Motor Forms, and 25 Motor Response Booklets

    Pricing and Qualification

    Price: $145.00

    Qualification Level B

    Ordering

    In stock

  • Bayley-4 Observation Checklist

    A102001600058

    Pricing and Qualification

    Price: $10.00

    Qualification Level B

    Ordering

    In stock

  • Bayley-4 Motor-Response Booklet

    A102001600056

    Package of 25

    Pricing and Qualification

    Price: $30.00

    Qualification Level B

    Ordering

    In stock

  • Bayley-4 Caregiver Report

    A102001600051

    Package of 25

    Pricing and Qualification

    Price: $80.00

    Qualification Level B

    Ordering

    In stock

  • Bayley-4 Motor Record Form

    A102001600050

    Package of 25

    Pricing and Qualification

    Price: $60.00

    Qualification Level B

    Ordering

    In stock

  • Bayley-4 Cognitive Record Form

    A102001600048

    Package of 25

    Pricing and Qualification

    Price: $65.00

    Qualification Level B

    Ordering

    In stock

  • Bayley-4 Language Record Form

    A102001600049

    Package of 25

    Pricing and Qualification

    Price: $65.00

    Qualification Level B

    Ordering

    In stock

  • Bayley-4 Cognitive, Language, and Motor Record Form

    A102001600046

    Package of 25

    Pricing and Qualification

    Price: $120.00

    Qualification Level B

    Ordering

    In stock

  • Bayley-4 Social-Emotional & Adaptive Behavior Questionnaire

    A102001600047

    Package of 25

    Pricing and Qualification

    Price: $110.00

    Qualification Level B

    Ordering

    In stock

  • Bayley-4 Complete Manipulative Set and Rolling Bag

    A102001600060

    Pricing and Qualification

    Price: $420.00

    Qualification Level B

    Ordering

    In stock

  • Bayley-4 Stimulus Book

    A102001600045

    Pricing and Qualification

    Price: $320.00

    Qualification Level B

    Ordering

    In stock

  • Bayley-4 Online Independent Study Training Program

    A103000164189

    Pricing and Qualification

    Price: $150.00

    Qualification Level B

    Ordering

    In stock

Training

Bayley-4 Overview

Watch this quick overview of what's new with the Bayley-4 launching this fall.

Watch video

Bayley-4 Training

Introductory Online Training: Provided complimentary with purchase of a complete Bayley-4 Kit

  • For paper kit purchases, please see the welcome letter with your kit for access to the training
  • For digital kit purchases, please access the welcome letter in the Q-global Resource Library for Bayley-4

Bayley-4 Online Independent Study Training Program

This fee-based online, independent study program provides detailed guidance for the administration and scoring of the Bayley-Scales of Infant and Toddler Development-Fourth Edition (Bayley-4).

Available to order via the pricing and ordering tab. Item ID: A103000164189

Note: Training orders will be processed within 72 business hours of order placement. The training is accessed via a welcome email sent to the email address associated with the order.

Bayley-4 Online Independent Study Training Program

Custom training options:

Interested in Bayley-4 training opportunities? Check out our available custom options.

View training options

 

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

 

Resources

The following resources are available.

Sample Reports

The following sample reports are available for Bayley-4.

 

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

Do I need to purchase the Vineland-3 manual for the Adaptive Behavior Scale?

No need to purchase a separate manual; the items from Vineland-3 used in Bayley-4 are a subset of items, specifically applicable to Bayley-4. All necessary information is in the Bayley-4 manual.

What is the difference between the Bayley Motor Record Form, and the Motor Response Booklet?
The motor response booklet contains the drawing items for the fine-motor scale, these are required for both manual and digital administration.
What is the difference between Bayley-4 Q-global Scoring Subscriptions and Bayley-4 Q-global Administration?

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

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.

Digital administration and scoring

What are the technical requirements for the digital administration?

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.

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

Is Q-global available for Mac?

Q-global is available on any internet enabled device, so it will work on a Mac.

Can you use digital administration if you are not currently on the internet?
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.
Will there be a scoring disc if you use paper forms?

A scoring subscription is available for this. There are 3 options:

1 year
3 years
5 years

Please see the Pricing & Ordering tab for current pricing.

How does Q-global work with EMR / EHR?
Q-global allows for the download of score reports in multiple formats (depending on the assessment) that can be uploaded to any EMR. For many assessments, there are also APIs available that allow for a more direct integration of reporting into the EMR. A future development is that Q-global will also allow for integration with single sign-on and credentials management software.
For the online administration how do you address child distraction from having an internet enabled device in the room?
Our user experience studies concluded that the digital administration provided an improved workflow because a separate record form and manual was no longer required, therefore less 'juggling' of materials, and more able to focus on the child.
How long can you access the results after administration?
Q-global scoring results remain in your Q-global account indefinitely.
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 can not be moved to an account within a separate entity / hierarchy.

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.
Is the information that you enter into the electronic form saved anywhere (online) or used for research? Is the information kept confidential?
Data storage is compliant with all regulations, please see this document for further details: Q-global Security FAQs
Can you pull up the original evaluation and add to it for re-evaluations?

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.

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

The digital administration of Bayley-4 is a digital record form with no child interacting with the administration device (e.g. tablet/laptop), likewise the administration guidelines between paper and digital are the same, therefore the digital administration should not affect the scoring of items.

In addition to this, we conducted a validity study comparing performance on Bayley-III (paper scoring) and Bayley-4 (digital scoring). The data indicate that the children's performance on the two tests are similar (no significant difference).

Psychometrics

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.

How are Growth Score 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 goes up.

The GSVs have a mean of 500 and a SD of 100. 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.

Training

Will we need new training if we already use the Bayley?

Various training options are available, including on-line training and face-to-face training. Further details available on the Training tab.

How do I access the complimentary training provided with 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

 

 

Webinars