The Bayley Scales of Infant and Toddler Development – Third Edition (Bayley-III; Bayley, 2005) may be used to identify developmental delays, chart a child’s progress, and teach parents about the child’s development.
The test is designed to be used with children ages 1 to 42 months. It consists of five scales: Cognitive, Language (Receptive and Expressive), Motor (Fine and Gross), Social-Emotional, and Adaptive Behavior (Conceptual, Social, and Practical). It also includes a test observations measure to aid in intervention planning. This addition includes growth scores, index scores (standard scores), subtest scaled scores, and percentiles. The Adaptive Behavior scale of the Bayley-III was adapted from the Parent/Primary Caregiver form of the Adaptive Behavior Assessment System – Second Edition (ABAS-II; Harrison & Oakland, 2003).
|Author (yr)||Age Range (yrs)||Method of Administration/Format||Approx. Time to Administer||Subscales|
|Bayley Scales of Infant and Toddler Development – Third Edition (Bayley-III)||Birth – 3 yrs., 6 Mos.|| |
Individually administered by clinician in play-based format for Cognitive, Language, and Motor (Fine/Gross) Scales; caregiver questionnaire for Social-Emotional and Adaptive
Functioning (Conceptual, Social, and Practical).Yields scaled scores, composite scores, and percentile ranks, growth and developmental age scores for Cognitive, Language and Motor.
|50 min. for 1– 12 mos.; 90 min. for 13–42 mos.|| |
(Receptive, Expressive, Total); Motor (Fine-Motor, Gross-Motor, Total); Adaptive Behavior (Communication,
Community Use, Functional Pre-Academics, Home
Living, Health and Safety, Leisure, Self-Care, Self-Direction, Social, Motor, Total)
Availability: The Psychologic Corporation (Harcourt Assessment/Pearson) http://bit.ly/V6ks3y