Questions About Behavioral Functions


Questions About Behavioral Functions

Stands for Questions About Behavioral Function. This is a 25-item, indirect rating assessment tool co-developed by John Matson and Vollmer and is used to assess the function of a target behavior. Individuals with ASD have a higher tendency to have challenging behaviors. Some of the behaviors can hinder the development of the individual. The QABF can be used to target some of the challenging behaviors.

The QABF can be easily administered and assessed for the following five-factor functions:

  • attention
  • escape
  • physical
  • tangible
  • non-social

Items are scored on two dimensions: occur/does not occur/does not apply, and on severity (rarely, some, and often). In the original Administrator’s Manual (Matson & Vollmer, 1995), the authors stated that a clear function is indicated when there is a score of at least 4 on a factor and when no other factor has a score higher than 3.

This questionnaire has a long-standing validity and reliability as an assessment tool for individuals dealing with intellectual disability and/or autism. As the number of individuals with ASD grows so does the need for solutions to guide them with the necessary support to be able to function at their full potential within our society.

The QABF can be completed and scored in 20 minutes. See a sample of the QABF.

Additional Assessment Tools:

  • Ages and Stages Questionnaires (ASQ)
  • Communication and Symbolic Behavior Scales (CSBS)
  • Parents’ Evaluation of Developmental Status (PEDS)
  • Modified Checklist for Autism in Toddlers (MCHAT)
  • Screening Tool for Autism in Toddlers and Young Children (STAT)

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