Bayley Scales of Infant and Toddler Development, Third Edition (Bayley-4)

N. Bayley

The Bayley Scales of Infant Development (Bayley-4) are recognised internationally as one of the most comprehensive tools to assess children from as young as one month old. With Bayley-III, it is possible to obtain detailed information even from non-verbal children as to their functioning.
Children are assessed in the five key developmental domains of cognition, language, social-emotional, motor and adaptive behaviour. Bayley-III offers significant additions and improvements to the previous editions.

Key features

• Core battery of five scales: Three scales administered with child interaction; cognitive, motor, language. Two scales
conducted with parent questionnaires; social-emotional, adaptive behaviour
• Caregiver Report Form - a template for the examiner to provide scores, information on tests given, how child performed and recommendations
• Behaviour Observation Inventory - separate scale for validating examiner and parent perceptions of the child’s responses
• New norms based on 1,700 children stratified according age, based on the 2000 US Census
• Ideal for team-testing or multi-disciplinary teams where a professional in each area may assess the child
• Flexible - can administer one or more domain subtests individually

• Rolling case for ease of travel

Additions

• Social-emotional subtest - Authored by one of the USA’s leading experts in child development, Stanley Greenspan
• Adaptive Behaviour subtest - Written by ABAS-II authors Patti L Harrison and Thomas Oakland
• Caregiver Report - With suggestions to help parents plan for their child
• Growth Scores and Growth Charts - Chart a child’s growth over time

• Screening Test - A true screener to determine if further testing is indicated

Improvements

• Easier to administer, more user-friendly; easy-to-follow record forms, easel-back stimulus book, child-appealing  manipulatives and play-based items to facilitate assessment
• Easier to determine if child performed the target behaviour Simplified scoring rules
• Extended floor and ceiling - Clinician can more easily identify lower functioning infants and toddlers
• More parent/caregiver involvement - New test items allow for family input
• Reduced kit weight and size

• Improved clinical studies - Special data collected and presented on children with high-incidence clinical diagnoses

Link between assessment and intervention

Bayley-III identifies infant and toddler strengths and competencies, as well as their weakness. It also provides a valid and reliable measure of a child’s abilities, in addition to giving comparison data for children with high-incidence clinical diagnoses. Growth scores can be used to chart intervention progress, and it’s useful in programme evaluation, ongoing monitoring of progress and outcome measurement.