Adaptive Behavior Scale part two: Relative severity of maladaptive behavior

Area of Science:

• Psychometrics
• Developmental Psychology
• Behavioral Science

Background:

• The Adaptive Behavior Scale (ABS) Part Two assesses maladaptive behaviors across 13 domains.
• Current ABS scoring focuses on behavior frequency (occasionally vs. frequently), not severity or importance.
• A need exists to quantify the relative severity of different maladaptive behaviors for improved clinical utility.

Purpose of the Study:

• To develop and validate severity ratings for 452 statements in ABS Part Two.
• To determine if frequency of occurrence (occasionally vs. frequently) impacts perceived severity.
• To explore the relative severity of maladaptive behaviors across different domains.

Main Methods:

• Thirty-three psychologists experienced in mental retardation rated 452 ABS Part Two statements on a severity continuum.
• Median severity scores were calculated for each statement.
• Correlational analyses examined the relationship between frequency, severity, and domain variations.

Main Results:

• Statements prefaced with "frequently" were consistently rated as more severe than those prefaced with "occasionally".
• Significant variations in relative severity were observed across the 13 maladaptive behavior domains.
• Correlations indicated that different maladaptive behaviors were systematically ordered along a relative severity continuum, independent of frequency.

Conclusions:

• The study successfully established severity scores for ABS Part Two statements, demonstrating high inter-rater reliability.
• Severity ratings provide a valuable psychometric enhancement to the ABS, complementing frequency data.
• These new severity scores offer potential clinical advantages for assessing and understanding maladaptive behaviors in individuals.