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Adaptive Behavior Assessment System, Third Edition

Patti Harrison, PhD, & Thomas Oakland, PhD

Create a complete picture of functional skills across the life span.


Use the ABAS-3 to:
  • Assess adaptive behavior skills
  • Assist in diagnosing and classifying various developmental, learning, and behavioral disabilities and disorders
  • Identify strengths and weaknesses for daily functional skills
  • Develop treatment plans and training goals
  • Document and monitor progress over time
  • Determine eligibility for services such as Social Security disability benefits, and evaluate capacity to live or work independently
  • Facilitate research and program evaluation
Features and Benefits:
  • New norms, updated item content, and improved ease of use
  • Assesses 11 essential skill areas within 3 major adaptive domains: Conceptual, Social, and Practical
  • Identifies adaptive behavior strengths and weaknesses
  • Integrates assessment, intervention planning, and progress monitoring
  • Compatible with AAIDD, DSM-5, and IDEA
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How to Use the Assessment

Items focus on practical, everyday activities required to function, meet environmental demands, care for oneself, and interact with others effectively and independently. On a 4-point response scale, raters indicate whether, and how frequently, the individual performs each activity.

The ABAS-3 includes five rating forms, each for a specific age range and respondent. These forms can be completed by parents, family members, teachers, daycare staff, supervisors, counselors, or others who are familiar with the daily activities of the individual being evaluated. In addition, the Adult Form can function as a self-rating. All forms are also available in Spanish

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Scales & Forms

  • Communication
  • Community Use 
  • Functional Academics
  • Health and Safety
  • Home or School Living
  • Leisure
  • Self-care
  • Self-direction
  • Social
  • Work
  • Motor


Patti L. Harrison, Ph.D.
Thomas Oakland, Ph.D.

Age Range Birth to 89 years

Administration Time 15 to 20 minutes

Administration Type Parent/Caregiver-completed
Self-Report (Ages 16-89)

Qualification Level B

  • Handscored
  • Software