RELIABLE MEASUREMENT2017-05-18T17:05:22+00:00


Reliable measurement requires that behaviors are defined objectively. Vague terms such as anger, depression, aggression or tantrums are redefined in observable and quantifiable terms, so their frequency, duration or other measurable properties can be directly recorded (Sulzer-Azaroff & Mayer, 1991). For example, a goal to reduce a child’s aggressive behavior might define “aggression” as: “attempts, episodes or occurrences (each separated by 10 seconds) of biting, scratching, pinching or pulling hair.” “Initiating social interaction with peers” might be defined as: “looking at classmate and verbalizing an appropriate greeting.”

ABA interventions require a demonstration of the events that are responsible for the occurrence, or non-occurrence, of behavior. ABA uses methods of analysis that yield convincing, reproducible, and conceptually sensible demonstrations of how to accomplish specific behavior changes (Baer & Risley, 1987). Moreover, these behaviors are evaluated within relevant settings such as schools, homes and the community. The use of single case experimental design to evaluate the effectiveness of individualized interventions is an essential component of programs based upon ABA methodologies.

This process includes the following components:

  • selection of interfering behavior or behavioral skill deficit
  • identification of goals and objectives
  • establishment of a method of measuring target behaviors
  • evaluation of the current levels of performance (baseline)
  • design and implementation of the interventions that teach new skills and/or reduce interfering behaviors
  • continuous measurement of target behaviors to determine the effectiveness of the intervention
  • ongoing evaluation of the effectiveness of the intervention, with modifications made as necessary to maintain and/or increase both the effectiveness and the efficiency of the intervention. (MADSEC, 2000, p. 21-23)

As the MADSEC Report describes above, treatment approaches grounded in ABA are now considered to be at the forefront of therapeutic and educational interventions for children with autism. The large amount of scientific evidence supporting ABA treatments for children with autism have led a number of other independent bodies to endorse the effectiveness of ABA, including the U.S. Surgeon General, the New York State Department of Health, the National Academy of Sciences, and the American Academy of Pediatrics (see reference list below for sources).

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