Nancy Bayley, PhD Glen P. Aylward, PhD, ABPP
Bayley™-4 is the most comprehensive assessment tool for determining developmental delays in children.
16 days to 42 months
Q-global (web-based); Manual
30 to 70 minutes (depending upon age of child)
Subtest level scaled scores, domain level composite scores, percentile ranks, confidence intervals, developmental age equivalents, and growth scale values
Bayley Scales of Infant and Toddler Development™, Fourth Edition (Bayley™-4) assesses infant and toddler development across five scales: Cognitive, Language, Motor, Social–Emotional, and Adaptive Behavior. Assessment of the Cognitive, Language, and Motor domains is accomplished by administering structured items to the child, and engaging the caregiver to support responses where appropriate. The Social-Emotional and Adaptive Behavior scales are administered via caregiver questionnaire which allows them to share their own observations of the child’s abilities
5 Developmental Domains
Cognitive: Visual preference, attention, memory, sensorimotor, exploration and manipulation, concept formation
Language: Receptive and expressive language subtests
Motor: Fine motor and gross motor subtests
Social-Emotional: Communicating needs, self-regulation using emotional signals
Adaptive Behavior: Listening and understanding, talking, caring for self, relating to others, and playing
Top Reasons to Buy the New Bayley-4
- Caregiver responses can be used to support the scoring of certain items
- Reduced number of items and improved workflow provides time savings for the
- The shortened adaptive behaviour content from the Vineland™-3 saves the caregiver significant time
- Content updates were made based on research and user feedback
Improved Psychometric Properties
- Updated normative data and clinical studies
Digital delivery option
- Bayley-4 will be available on Q-global® via a digital record form with integrated instructions and flexible administration to help navigate the assessment and improve the examiner workflow.
- Adjusts the start point based on the estimated due date if the child was premature
- No need for a separate record form or
- Supports non-linear administration and administering related items
Ease of use
- Messaging included to guide establishing basal and meeting discontinue rules
- Contains pictorial representation of administration and examples for
- All items in a series can be simultaneously scored based on a single response
- A review screen ensures all required data is captured prior to submitting
- Item score suggestions are provided based on when the timer is stopped or the number of correct responses to trials
The following resources are available.
The following sample reports are available for Bayley-4.