Purpose: Designed to assess handicapped and non-handicapped persons in their personal and social functioning.
Population: Birth to 18 years and low functioning adults.
Score: 13 scores.
Time: 2 editions: Interview Edition (20-60) minutes, Interview Ed., Expanded Form (60-90) minutes.
Authors: Sara S. Sparrow, David A. Balla, and Dominick V. Cicchetti.
Publisher: American Guidance Service.
Description: The Vineland Adaptive Behavior Scales (VABS) were designed to assess handicapped and non-handicapped persons from birth to adulthood in their personal and social functioning. Following Edgar Doll's original conceptualization of adaptive behavior as multidimensional in structure and his measurement of the behaviors by areas, the VABS is organized around four Behavior Domains: Communication, Daily Living Skills, Socialization, and Motor Skills.
Scoring: Standard score equivalents for domain raw scores and Adaptive Behavior Composite Standard scores were developed by the Angoff and Robertson procedure already familiar to users of the Kaufman Assessment Battery for Children. The manual also provides percentile ranks and stanines (for the domain and Composite scores), adaptive levels (by percentile groups), age equivalents (by raw score conversions) and maladaptive levels (for the Maladaptive Behavior domain.
Reliability: Split-half and test-retest reliability coefficients for the Composite scores are good, ranging from median values of .83 for the Motor Skills domain to .94 for the Composite. Interrater coefficients are lower for the same measures: .62 to .78. When broken down by subdomains, the coefficients fluctuate a great deal and some are quite low.
Validity: Selected standardization subgroups were compared on the original Vineland, the ABIC, the K-ABC, the PPVT-R, and the VABS. These concurrent measures exhibited low to moderate correlations, with generally higher coefficients obtained when the comparisons were made on subjects with handicapping conditions.
Norms: Standardization sampling followed 1980 census data and included 3,000 subjects from birth through 18-11 equally divided by sex.
Suggested Uses: The VABS is recommended for assessment in clinical
and research settings.