Bayley Scales of Infant and Toddler Development | Fourth Edition (2023)

Overview

Publication date:

September 2019

(Video) Part 1 Bayley Infant & Toddler III Screen
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.

(Video) Bayley-4 Overview

(Video) Bayley Scales of Infant Development - with Dr Z
Completion time:

30 to 70 minutes (depending upon age of child)

Administration:

Paper-and-pencil; Q-global

Scoring options:

Q-global (web-based); Manual

Telepractice:
Guidance on using this test in your telepractice
(Video) Bayley-4 Overview Webinar

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

Bayley Scales of Infant and Toddler Development | Fourth Edition (1)

Telepractice

Find out how to use this test in your telepractice.

Learn more

Sample Reports

The following sample reports are available for Bayley-4.

  • Bayley-4 Cognitive, Language and Motor Score Report
  • Bayley-4 Social-Emotional/Adaptive Behavior Score Report
  • Bayley-4 Cognitive, Language, Motor, and Social-Emotional and Adaptive Behavior Scales Score Report

Training

Bayley-4 Overview

Watch this video to learn more about the new features of Bayley-4.

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

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 copy.

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.


Webinars

The following training events are available for Bayley-4
(Video) Bayley Scales of Infant and Toddler Development III

FAQs

What is the Bayley Scales of Infant and Toddler Development Test? ›

The Bayley Scales of Infant and Toddler Development (BSID) is a clinical evaluation developed to help identify children with developmental delay who may require intervention services (Bayley, 1969, 1993, 2005). The BSID-III consists of three areas of development: cognitive, language, and motor.

What are the five components of the Bayley Scales? ›

Assesses 5 domains: cognitive, language, motor, social-emotional, and adaptive. Motor scale includes both a fine motor and a gross motor subtest and can be administered separately to obtain a "motor composite".

What is Bayley's scales of Infant intelligence? ›

The Bayley Scales of Infant and Toddler Development is an assessment instrument designed to measure motor, cognitive, language, social-emotional, and adaptive behavior development in babies and young children. 1 It involves interaction between the child and examiner and observations in a series of tasks.

How accurate is the Bayley test? ›

For children with Bayley diagnostic test scores of 8 - 19, the Bayley screening test was very accurate, with 83.84% correctly identified as proficient in the cognitive subtest and 92.11% identified as proficient in the receptive communication subtest (18).

What does the Bayley Scales of Infant Development determine? ›

The Bayley–III provides information about whether a child's developmental trajectory in the cognitive domain is proceeding as expected, relative to same-age peers. It also provides this type of information for language, motor, social-emotional, and adaptive behavior domains.

What are the three main scales measured by the Bayley Scales of Infant Development? ›

The Bayley-III has three main subtests; the Cognitive Scale, which includes items such as attention to familiar and unfamiliar objects, looking for a fallen object, and pretend play, the Language Scale, which taps understanding and expression of language, for example, recognition of objects and people, following ...

What are the Bayley-4 descriptive categories? ›

cognitive development, • communication, • social or emotional development, and • adaptive development. Bayley-4 assesses development in these five domains.

What cognitive test does a 3 year old take? ›

The WPPSI-III is one of the most widely used tests of cognitive functioning with young children (2 years, 6 months through 7 years, 3 months).

What is the difference between Bayley 3 and Bayley-4? ›

Difference between BSID III versus BSID 4

Scoring is Dichotomous (1, 0) in BSID III, whereas scoring is polytomous (2,1,0) in BSID4. When compared to BSID III, BSID 4 takes approximately 30% less time to complete the assessment. BSID 4 has questions for the caregiver.

What age is Bayley-4 equivalent to? ›

Bayley Scales of Infant and Toddler Development™, Fourth Edition (Bayley™-4)15 is a standard series of measurements originally created to assess the development of infants and toddlers, ages 16 days–42 months.

Who can administer the Bayley-4? ›

Psychologists, Speech Pathologists, Occupational Therapists, Physiotherapists, Psychiatrists, Neonatologists and Paediatricians: In order to enrol and use the Bayley-4 as a Trained Clinician, professionals must have a sound understanding of child development and be a user level of C or B.

Which 2 areas does the Bayley scale of Infant development focus on? ›

The Bayley Scales of Infant Development (BSID) measure the mental and motor development and test the behavior of infants from one to 42 months of age.

What is the Bayley 4 assessment? ›

Development™, Fourth Edition (Bayley™-4)

assesses infant and toddler development across five scales: Cognitive, Language, Motor, Social–Emotional, and Adaptive Behavior.

What are cognitive tests for 2 year olds? ›

The WPPSI-III is one of the most widely used tests of cognitive functioning with young children (2 years, 6 months through 7 years, 3 months).

Is Bayley 4 reliable? ›

All measures reflect a high degree of reliability in the items, and that the Bayley-4 scales are equally reliable for assessing individuals with different levels of development or individuals with different clinical diagnoses.

Which is the most important determinant of child birth weight? ›

Maternal age, occupation, parity, socioeconomic status and infant's gender, appear to be significant determinants of birth weight.

What are the 4 principles of development that all babies need to thrive? ›

All domains of child development—physical development, cognitive development, social and emotional development, and linguistic development (including bilingual or multilingual development), as well as approaches to learning—are important; each domain both supports and is supported by the others.

What are the two most common assessments used to determine the condition of the newborn? ›

Temperature. This checks that the baby is able to have a stable body temperature in normal room. Pulse. A newborn's pulse is normally 120 to 160 beats per minute.

What are the 3 common measurements done on infants? ›

What other measurements are taken of the newborn? Like weight, length and head circumference help your baby's healthcare provider get an idea of his or her overall health. They may also be measured using metric units, centimeters (cm) instead of inches (in).

Why is the Bayley III an appropriate measure of Infant and toddler intelligence? ›

The Bayley-III's uses lie in measuring a child's early developmental progress, identifying issues and planning intervention. The cognitive and language scales are useful for an early diagnosis of learning disorder and can also differentiate more severe forms of learning disorders.

What does the developmental profile 4 measure? ›

The DP-4 measures development across five key areas: Physical, Adaptive Behavior, Social-Emotional, Cognitive, and Communication. Each area represents a separate scale, and all five scales can be combined to create a general composite score called the General Development Score.

What is Bayley III scale? ›

The Bayley Scales of Infant and Toddler Development, Third Edition (Bayley-III; Bayley, 1993, Bayley, 2006) is an individually administered instrument designed to assess the developmental functioning of infants, toddlers, and young children aged between 1 and 42 months.

What intellectual skills should a 3 year old have? ›

Cognitive milestones
  • Correctly names some colors.
  • Understands the concept of counting and may know a few numbers.
  • Approaches problems from a single point of view.
  • Begins to have a clearer sense of time.
  • Follows three-part commands.
  • Recalls parts of a story.
  • Understands the concept of same/different.
  • Engages in fantasy play.
Nov 2, 2009

What should a 3 year old be able to count up to? ›

Most 3-year-olds can count to three and know the names of some of the numbers up to ten. Your child is also starting to recognize numbers from one to nine.

What should a normal 3 year old be able to do? ›

At this age, your child is extremely active, mobile and learning in very physical ways. Children at this age are walking, running, kicking and throwing. They are exploring their world and picking up new skills, like kicking a ball or riding a tricycle.

How is the developmental screening test scored? ›

A normal score means no delay in any domain and no more than one caution; a suspect score means one or more delays or two or more cautions; a score of untestable means enough refused items that the score would be suspect if they had been delays.

What does Bayley 4 measure? ›

cognitive development, • communication, • social or emotional development, and • adaptive development. Bayley-4 assesses development in these five domains. Assess level of performance of infants and toddlers by observing the child's interaction with stimuli designed to engage him or her.

What is the difference between Bayley 3 and Bayley 4? ›

Difference between BSID III versus BSID 4

Scoring is Dichotomous (1, 0) in BSID III, whereas scoring is polytomous (2,1,0) in BSID4. When compared to BSID III, BSID 4 takes approximately 30% less time to complete the assessment. BSID 4 has questions for the caregiver.

What age is Bayley 4 equivalent to? ›

Bayley Scales of Infant and Toddler Development™, Fourth Edition (Bayley™-4)15 is a standard series of measurements originally created to assess the development of infants and toddlers, ages 16 days–42 months.

Who can administer the Bayley assessment? ›

Psychologists, Speech Pathologists, Occupational Therapists, Physiotherapists, Psychiatrists, Neonatologists and Paediatricians: In order to enrol and use the Bayley-4 as a Trained Clinician, professionals must have a sound understanding of child development and be a user level of C or B.

How do you assess a child's developmental level? ›

Your child will get a brief test, or you will complete a questionnaire about your child. The tools used for developmental and behavioral screening are formal questionnaires or checklists based on research that ask questions about a child's development, including language, movement, thinking, behavior, and emotions.

What is a normal ASQ score? ›

STEP ONE: Calculate total scores for each area.

Add up the responses to the six questions in each area to calculate a score for each area. Scores for each area should fall between 0 and 60.

What is a developmental rating scale? ›

A tool that can be used to develop a complete picture of individual children in order to plan appropriate strategies and activities to promote growth and development. • A comfortable way to help families recognize emerging skills and abilities of their child. •

What is the standard score for Bayley-4? ›

The Bayley-4 Fine Motor subtest had a scaled score of 9.9 which equates to a standard score of 99.5 and the PDMS–2 Fine Motor Quotient was 97.5.

Is Bayley-4 reliable? ›

All measures reflect a high degree of reliability in the items, and that the Bayley-4 scales are equally reliable for assessing individuals with different levels of development or individuals with different clinical diagnoses.

Videos

1. Developmental Assessments using NBAS & BAYLEY scales
(HUMAN DEVELOPMENT)
2. Ellisa's Bayley Testing
(Mackenzie Purma)
3. Bayley-4 Overview Webinar
(Pearson Assessments US)
4. Development follow up for NICU babies
(HNEkidshealth)
5. Bayley-4 Online Learning – Part One
(Pearson Clinical Australia)
6. Bayley Scale of Infant Development
(Sharms Dalupan)
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