Bayley Scales of Infant and Toddler Development-4

About#

The Bayley Scales of Infant and Toddler Development, 4th Edition (Bayley-4) is a standardized, examiner-administered assessment of early developmental functioning in children from 1 to 42 months of age. It evaluates cognitive, language (receptive and expressive), and motor (fine and gross) development, and can also include parent-reported social-emotional and adaptive behavior domains. The Bayley-4 provides norm-referenced composite scores that are widely used to identify developmental delays and characterize neurodevelopmental profiles. The Bayley-4 will be used to assess participants up to age 42 months, as well as older participants who are unable to obtain valid scores on the SB5.

Administration

Administration type	Direct Assessment
Setting	{}
Duration	45 min
Respondent	Child
Visits	Visits 1-3
Subscales	Cognitive Scale Language Scale: Receptive and Expressive domains Motor Scale: Fine Motor and Gross Motor domains Social-Emotional Scale from Greenspan Chart Adaptive Behavior Scale from Adaptive Behavior Assessment System
Ages	0-18 years
Ability based selection	Either the Bayley-4 or Stanford-Binet-5 is administered based on child's ability level.

Scoring procedures

infoProprietary instrument: The DCC does not generate scores or reproduce scoring procedures for this instrument. Refer to the publisher's official documentation for scoring instructions.

Total items	Cognitive Scale (91 items) Language Scale: Receptive (49 items) & Expressive (48 items) domains Motor Scale: Fine Motor (66 items) & Gross Motor (72 items) domains Social-Emotional Scale (from Greenspan Chart) Adaptive Behavior Scale (from Adaptive Behavior Assessment System)
Response scale	Dichotomous (0, 1)
Score types	Summary scores standardized/scaled to norms
Missingness handling	Complete responses required; no summary score is computed if any item is missing or invalid.