Behavior Analysis is the scientific study of behavior. Applied Behavior Analysis (ABA) is the application of the principles of learning and motivation from Behavior Analysis, and the procedures and technology derived from those principles, to the solution of problems of social significance. Many decades of research have validated treatments based on ABA.
Over the past 30 years, several thousand published research studies have documented the effectiveness of ABA across a wide ransge of:
?populations (children and adults with mental illness, developmental disabilities and learning disorders)
?interventionists (parents, teachers and staff)
?settings (schools, homes, institutions, group homes, hospitals and business offices), and
?behaviors (language; social, academic, leisure and functional life skills; aggression, selfinjury, oppositional and stereotyped behaviors)
Applied behavior analysis is the process of systematically applying interventions based upon the principles of learning theory to improve socially significant behaviors to a meaningful degree, and to demonstrate that the interventions employed are responsible for the improvement in behavior (Baer, Wolf & Risley, 1968; Sulzer-Azaroff & Mayer, 1991).
?Socially significant behaviors? include reading, academics, social skills, communication, and adaptive living skills. Adaptive living skills include gross and fine motor skills, eating and food preparation, toileting, dressing, personal self-care, domestic skills, time and punctuality, money and value, home and community orientation, and work skills.
ABA methods are used to support persons with autism in at least six ways:
?to increase behaviors (eg reinforcement procedures increase on-task behavior, or social interactions);
?to teach new skills (eg, systematic instruction and reinforcement procedures teach functional life skills, communication skills, or social skills);
?to maintain behaviors (eg, teaching self control and self-monitoring procedures to maintain and generalize job-related social skills);
?to generalize or to transfer behavior from one situation or response to another (eg, from completing assignments in the resource room to performing as well in the mainstream classroom);
?to restrict or narrow conditions under which interfering behaviors occur (eg, modifying the learning environment); and
?to reduce interfering behaviors (eg, self injury or stereotypy).
ABA is an objective discipline. ABA focuses on the reliable measurement and objective
evaluation of observable behavior.
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 is a process that 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, and
?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).
Discrete Trial Training
Discrete trial training (DTT) is a particular ABA teaching strategy which enables the learner to acquire complex skills and behaviors by first mastering the subcomponents of the targeted skill. For example, if one wishes to teach a child to request a a desired interaction, as in "I want to play," one might first teach subcomponents of this skill, such as the individual sounds comprising each word of the request, or labeling enjoyable leisure activities as "play." By utilizing teaching techniques based on the principles of behavior analysis, the learner is gradually able to complete all subcomponent skills independently. Once the individual components are acquired, they are linked together to enable mastery of the targeted complex and functional skill. This methodology is highly effective in teaching basic communication, play, motor, and daily living skills.
Initially, ABA programs for children with Autism utilized only (DTT), and the curriculum focused on teaching basic skills as noted above. However, ABA programs, such as the program implemented at CARD, continue to evolve, placing greater emphasis on the generalization and spontaneity of skills learned. As patients progress and develop more complex social skills, the strict DTT approach gives way to treatments including other components.
Specifically, there are a number of weaknesses with DTT including the fact the DTT is primarily teacher initiated, that typically the reinforcers used to increase appropriate behavior are unrelated to the target response, and that rote responding can often occur. Moreover, deficits in areas such ?emotional understanding,? ?perspective taking? and other Executive Functions such as problem solving skills must also be addressed and the DTT approach is not the most efficient means to do so.
Although the DTT methodology is an integral part of ABA-based programs, other teaching strategies based on the principles of behavior analysis such as Natural Environment Training (NET) may be used to address these more complex skills. NET specifically addresses the above mentioned weaknesses of DTT in that all skills are taught in a more natural environment in a more ?playful manner.? Moreover, the reinforcers used to increase appropriate responding are always directly related to the task (e.g., a child is taught to say the word for a preferred item such as a ?car? and as a reinforcer is given access to the car contingent on making the correct response). NET is just one example of the different teaching strategies used in a comprehensive ABA-based program. Other approaches that are not typically included in strict DTT include errorless teaching procedures and Fluency-Based Instruction.