Applied Behavior Analysis (ABA) and Autism

Much publicity has recently surrounded the Applied Behavior Analysis approach to the treatment of Autism. But what exactly is ABA? How do you know if an intervention program works? How do you select a behavior analyst in the first place, making sure you don't inadvertently choose someone who is not properly trained in the ABA methodology? What rights do clients of these services have to effective treatment? Recognizing the confusing number of claims and choices which clients and parents of autistic children face, this CCBS Autism Section addresses these questions (and more) to give consumers of ABA services the information needed to choose wisely.

Applied Behavior Analysis for Autism by Gina Green, Ph.D., BCBA-D
Frequently Asked Questions about ABA
Guidelines for Selecting Behavior Analysts Consumer Guidelines for Identifying, Selecting, and Evaluating Behavior Analysts Working with Individuals with Autism Spectrum Disorders
Evaluating Intervention Programs
Rights of Clients

Frequently Asked Questions about Autism and Behavior Analysis

Applied Behavior Analysis (ABA) is the most comprehensive and most effective approach to improving the lives of persons with autism and their families.

The following questions illustrate common misconceptions about the ABA approach to treating Autism:

ABA with persons with autism is not new and is not a fad

Research began in the early 1960s with the studies of Charles Ferster, Ivar Lovaas, Montrose Wolf and Todd Risley to name just the best known pioneers.

As long ago as 1981, applied behavior analysis was identified as the treatment of choice for autistic behavior. (See the literature review by Marion K. DeMyer, J. Hingtgen and R. Jackson.) Here are some references.

Recently, Johnny Matson and his colleagues counted more than 550 studies published in scientific journals showing the effectiveness of behavior analytic procedures with persons with autism.

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ABA is comprehensive

ABA has been effective for teaching a vast range of skills to people with disabilities as well as to many other people in every setting in which people live, study and work

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ABA is definitely not just useful for managing "bad" behavior or for people with severe behavior problems

Although ABA does provide the best methods for managing problem and aberrant behavior such as self-injurious, ritualistic, repetitive, aggressive and disruptive behavior, it does this through teaching alternative pro-social behavior.

Proper application of behavior principles and procedures also prevents behavior from becoming a problem.

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Is ABA basically just early intervention/Lovaas/discrete trial training?

The terms Behavior Analysis, Applied Behavior Analysis, and Early Intensive Behavioral Intervention (EIBI) are sometimes used as if they mean the same thing. However, they’re different.

Behavior analysis is a science that focuses on identifying and understanding principles that influence behavior.  Through years of research, these principles have been applied to address socially important problems and eliminate behaviors that interfere with normal functioning.

The application of behavior analytic principles to accomplish change is called Applied Behavior Analysis (ABA) and has been show to be effective with a broad range of individuals (disabled and non-disabled) and to address a wide array of behaviors and conditions.  Early Intensive Behavioral Intervention (EIBI) involves the further defining of ABA principles into a package of techniques that can be applied to children with autism to foster learning and development.  To maximize an individual’s chances to achieve the best outcomes, the “package” of techniques may be defined and redefined from among many ABA evidence-based techniques.

One commonly used technique in EIBI instruction is the “discrete trial.”  In discrete-trials instruction (Anderson & Jablonski, 2005; Anderson & Romancyzk, 1999; Smith, 2001), the instructor provides a concise instruction, question, or activity when the child is most attending, rewards the occurrence of the desired behavior or, if the child fails to respond or responds incorrectly, the instructor delivers feedback and provides a prompt to ensure that the correct or desired response occurs.  The discrete-trials method also has become closely associated with other aspects of the instructional context where the instructor and child sit facing each other in chairs, and the child’s legs rest between the instructors.

Some have incorrectly suggested (Speckly & Boyd, 2009) that ABA was developed by Ivar Lovaas and is defined by its use of discrete-trials instruction.  Although Dr. Lovaas deserves special recognition for his seminal work in the area of autism, he is neither the sole developer of ABA nor is his model exclusively defined by the use of discrete-trials instruction.   There are many individuals, including Dr. Lovaas, who contributed to nearly 60 years of research and the delineation of the key principles of Applied Behavior Analysis.

The discrete-trials method has been contrasted with another behavioral approach called incidental teaching.  This approach has been described and demonstrated to be effective for many children (McGee, Krantz, Mason, McClannahan, 1983).  In this method, the instructor assesses the child’s ongoing interests, follows their lead, restricts access to high interest items, and constructs a lesson within the natural context, with a presumably more motivated child.

At any given point in time, each method may have benefits and limitations.  It is important to think of discrete trials and incidental teaching as points along a continuum of teaching contexts and techniques.  The continuum includes a gradient of situations that blend teacher directed and child initiated opportunities for learning.  Each point along this continuum has advantages and disadvantages and each may be important for an individual child at any given time in their development.  The decision to teach in a given context is based upon many individual variables including the child’s attention, individual distractibility, spontaneous interest in toys and materials, the lesson being taught and, most importantly, the child’s progress.

In summary, it important to emphasize that the instructional technique of discrete trials is one of many strategies that a well trained teacher will use to structure the learning environment and promote learning in an ABA approach.   

Anderson, S. R., and Jablonski, A.  (2005).  Discrete trial instruction.  In M. Hersen (Ed),  Encyclopedia of Behavior Modification and Cognitive Behavior Therapy.  Thousand Oaks, CA:  Sage Publications.

Anderson, S. R., and Romancyzk, R. (1999).  Early Intervention for you children with autism: Continuum-based behavioral models.  Journal of the Association for the Severely Handicapped, 24, 162-173. 

Smith, T. (2001) Discrete trial training in the treatment of autism.  Focus on Autism and Other Developmental Disabilities, 16, 86 – 72.

McGee, G. G., Krantz, P. J., Mason, D., & McClannahan, L. E. (1983).  A modified incidental-teaching procedure for autistic youth:  Acquisition and generalization of receptive object labels.  Journal of Applied Behavior Analysis, 16, 329 - 338

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ABA is not easy and not a "miracle cure"; there are NO cures – psychological or medical

ABA is not easy and not a “miracle cure”; there are NO cures – psychological or medical. Anyone who has tried to do ABA knows it is not easy. However, when done properly, progress can be seen very quickly. Positive results make the effort worthwhile.

You will not find a shred of scientifically acceptable evidence that treatments using psycho-dynamic psychotherapies or holding therapy are effective. The theory behind them has been discredited.

There are no medical treatments for autism itself. Persons with autism, of course, have medical needs for which pharmacological and other medical treatments are appropriate.

In a recent review of autism in the New England Journal of Medicine, Dr. Isabelle Rapin concluded: “No drug or other treatment cures autism, and many patients do not require medication. However, psychotropic drugs that target specific symptoms may help substantially.” She said further that: “The most important intervention in autism is early and intensive remedial education that addresses both behavioral and communication disorders.” (p. 102)

“Many other …(than educational/behavioral and medical)…interventions are available, but few, if any, scientific studies support their use. These therapies remain controversial and may or may not reduce a specific person's symptoms. Parents should use caution before subscribing to any particular treatment. Counseling for the families of people with autism also may assist them in coping with the disorder.” (From NIMH Fact Sheet)

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ABA is not mechanical

People are often told that behavior analysts are cold scientists who tell others what to do. In fact, behavior analysts know that successful programs require that they work collaboratively with all concerned. Being scientific means being guided by objective results and modifying procedures because other demands in the school or family must also be met and to make best use of the knowledge and skills of carers and the persons with autism as well.

A series of papers by Montrose Wolf and his associates published between 1964 and 1967 illustrate these points very well. The articles describe how they worked first with “Dicky” when he was 3-1/2 years old in a hospital and made transitions from hospital to home and pre-school. Successful methods were developed in the hospital, the parents practiced them there, and then in stages Dicky returned home and was enrolled in a generic nursery school, where he acquired self-help, pre-academic and play skills. Many people were involved in planning and making those programs work.

And ABA does not turn people into robots

“... Anne-Marie is friendly and caring. She continues to make contact more easily with her peers and she is forming deeper relationships with them.... Anne-Marie feels close to her teachers and is sharing more of her thoughts with them now... Anne-Marie is a cooperative, helpful group member who has learned to take her share of responsibility ....Anne Marie is a capable child who is eager to learn. It’s a pleasure to see Anne-Marie feeling comfortable and relaxed in her school environment and actively enjoying our various group activities with her classmates...” (Maurice, p. 286).

Anne-Marie was the older of two children who had been treated very successfully by ABA methods. These comments were made by her pre-kindergarten teachers in their end-of-year report. Other parents have reported similar outcomes.

[Catherine Maurice’s book, Let Me Hear Your Voice. A Family’s Triumph over Autism, was published in 1993.]

Studies have shown that ABA programs are successful in generating spontaneous and creative behavior.

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What are the key features of Applied Behavior Analysis?

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Can PECS and ABA be done together?

Following the very first presentations and publications, an oft repeated statement regarding PECS within the field of applied behavior analysis suggested, “You can’t do PECS and ABA.” This statement implies that there is something fundamentally incompatible with doing a traditional Applied Behavior Analysis (ABA) program and using PECS.  From a Skinnerian perspective this appears immediately surprising, as context is always an aspect of how particular operants are defined- not the ‘style’ of the particular lesson.

As noted, the first talks and presentations regarding PECS occurred at the annual ABAI conferences and between 1987 and 1993, with over 20 PECS talks and posters.  Additionally there were another 20 on elements of the Pyramid Approach (a model that blends the principals of behavior analysis with a strong emphasis on functional communication as well as functional activities, see Bondy, 2011). Thus, the earliest descriptions of PECS were for audiences familiar with behavior analysis. Discussions about how to teach the effective use of PECS placed clear emphasis upon the use of reinforcement, prompting, shaping, error correction, data collection and analysis, and a host of other primary features of a behavioral orientation. That PECS currently is viewed as ‘mainstream’ within the broader field of applied behavior analysis is evidenced by the fact that at the 2010 ABAI convention 18 paper/posters involving PECS were presented by investigators having no direct association  with the PECS originators.

Fundamentally, ABA is often misunderstood.  It is therefore not surprising that PECS is often misunderstood. From this author’s perspective, many people apparently view ABA programs as solely relying upon a ‘discrete trial’ approach, in which the teacher and a student sit at a desk and the teacher leads all lessons. Another common misinterpretation is viewing discrete trial lesson formats as requiring a discriminative stimulus set that is occasioned initially by the teacher,  and thus failing to see lessons that focus on student initiation as conforming to ‘true ABA format’ (see Leaf & McEachin, 1999, for a thorough review of myths regarding ABA programming).   Perhaps because of the early popularity of Lovaas’ work (1987) and Maurice’s publication of Let me Hear Your Voice (1993) many came to view his strategies as synonymous with ABA. Perhaps, then, anything that was not of this particular ilk was seen by some as ‘non-ABA.’ Of course, there are many ABA strategies that have been developed to promote initiation and generalization from early in a lesson; primarily strategies broadly based upon ‘incidental teaching.’ The protocol within PECS uses two trainers in Phase I to encourage rapid acquisition of manding without the communicative partner (i.e., the ‘listener’) making any statements. Thus, the teacher using a particular reinforcer to entice the student to initiate would not say, “What do you want?” or “Give me the picture” or anything that might function as a prompt (or indeed, turn the intended mand/tact lesson into an intraverbal/mand/tact or some other even more multiply-controlled mand). Withholding a direct vocal-verbal antecedent seems to contrast the PECS protocol from those often viewed as a ‘traditional’ discrete-trial protocol. In order to promote relatively spontaneous manding, a teacher cannot pre-set the number of requests a student must make within a session because the teacher cannot perfectly control the factor of motivation and satiation.

As long as one maintains that applied behavior analysis does not have a single form or style, it would appear, then, that PECS is an accepted part of the field.  On the other hand, were one to insist that ABA should be restricted to the work developed by Lovaas, it should be noted that he included a chapter on PECS within his last significant book Teaching Children with Developmental Delays (2003).  Even with this inclusion, not everyone has aligned PECS as falling within a formal ABA approach. Within a recent study purporting to compare a strict ABA package with one that is described as ‘eclectic’ in nature, PECS was noted as falling within a group of ‘eclectic’ strategies, rather than within what constitutes accepted components of an ABA program (Howard, Sparkman, Cohen, Green & Stanislaw, 2005). This selection-bias may relate to a failure to see that while the Pyramid Approach reflects the broad scope of behavior analysis, and PECS is simply a part (a visually mediated system) of a part (functional communication) of the whole. Any broad application of behaviorally based strategies that provide educational programming may well include PECS for some individuals.

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Guidelines For Selecting Behavior Analysts

The demand for behavior analysts far exceeds the number of persons with the expertise required to provide effective ABA programs. Enabling families to access affordable and competent behavior analysts is an urgent problem, because this is not an area in which “do-it-yourself” programming is advisable. Often, however, particularly for persons living far away from services, parents will have to assume major responsibility for their children’s intervention programs.

CCBS will not tell you who is, or who is not competent. Standards regarding the competent delivery of behavioral service have been identified, but they have not been fully implemented.

A useful starting point may be to view by state the Certificant Registry of those individuals credentialed as Board Certified Behavior Analysts or Board Certified Associate Behavior Analysts, maintained by the Behavior Analyst Certification Board.

Another valuable resource is the Directory of Graduate Training Programs in Behavior Analysis published by the Association for Behavior Analysis International (ABAI). ABA is the professional organization for the discipline. Although ABAI does not accredit or certify individuals, it does accredit graduate training programs.

In addition, The Autism Special Interest Group of ABAI has adopted guidelines for consumers of applied behavior analysis services to individuals with autism.

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How To Evaluate Intervention Programs

August 1999

Evaluating Claims About Treatments for Autism

Gina Green has written an excellent chapter by that name in Maurice, Green and Luce (1996, Chapter 2). She describes types of evidence and explains why subjective evidence – testimonials, anecdotes and personal accounts – are not reliable.

Testimonials alone are simply too ambiguous to be the basis for making critical decisions about which treatment program to choose. Resources and time are too scarce to be wasted on treatments that have not been shown to be effective.
Now, we have a substantial body of controlled quantitative research on programs of treatment for autism. Now there has been ample time to properly investigate currently popular treatments, but most of these programs have not been.

Advocates of treatments should be asked to:

  1. Describe the exact purposes of the treatment – what is it intended to achieve?
  2. Describe exactly how the treatment is conducted – there should be no mystery or secrecy about the methods and procedures being used.
  3. Describe how treatment effects were measured – what numerical data were collected and how were they collected?
  4. Show before and after data collected by independent – unbiased – evaluators;. and
  5. Show follow up data – do the persons maintain gains? do they continue to improve? do they regress?

Only applied behavior analysis is able to answer those questions convincingly. Gina Green argues the case in the next chapter entitled "Early Behavioral Intervention for Autism: What Does Research Tell Us?" Then, in Chapter 4, Tristram Smith answers the question, “Are Other Treatments Effective?” His conclusions are:

“Nonbehavioral special education classes, individual therapies, and biological interventions (except major tranquilizers) have not been established as effective treatments for children with autism. Some treatments, especially Facilitated Communication and psychoanalysis, are quite harmful and definitely should be avoided. Major tranquillizers offer an alternative to behavioral treatment for managing disruptive behavior, but they can cause major side-effects and therefore are a last resort rather than a first-line intervention. Several other biological treatments (Prozac, Anafranil, naltrexone, and B6 with magnesium) may be effective but require further research.

In short, behavioral treatment has much more scientific support than any other intervention for children with autism. Consequently, if behavioral treatment is available, or if families are in a position to set up their own behavioral treatment program, the best initial course of action may be to concentrate exclusively on carrying out behavioral treatment as well as possible, rather than looking for ways to supplement it with other treatments.” (Maurice, Green & Luce, 1996, Page 56).

In this published paper, [Smith T. (1999). Outcome of early intervention for children with autism. Clinical Psychology: Research and Practice, 6, 33-49], Tris Smith has carefully studied peer-reviewed outcome investigations of ABA programs, Project TEACCH, and Colorado Health Sciences. He found that the latter two programs have shown little improvements for most of the children, but some subgroups may have benefited.

In contrast, he found convincing evidence that ABA programs increase adaptive behavior and reduce maladaptive behavior. He also noted that these programs may substantially raise IQ and other standardized test scores, while reducing the need for special services. However, he cautioned that the quality of the research on IQ, other test scores, and school placement does not permit firm conclusions; replications of this research are needed.

For up to date evaluations of biological interventions, see

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Rights of Clients

A committee of behavior analysts have prepared a position paper that has been adopted by the Association for Behavior Analysis International. [See Van Houten et al. The right to effective behavioral treatment. Journal of Applied Behavior Analysis, 1988, vol. 21, pp. 381-384. This document is also available from the Association for Behavior Analysis International.]

The position paper asserts that all persons with special needs have the following rights:

  1. The right to a therapeutic environment.
  2. The right to services whose overriding goal is personal welfare
  3. The right to treatment by a competent behavior analyst
  4. The right to programs that teach functional skills
  5. The right to behavioral assessment and ongoing evaluation
  6. The right to the most effective treatment procedures available.

The right to treatment by a competent behavior analyst is elaborated as follows:

“In cases where a problem or treatment is complex or may pose risk, individuals have a right to direct involvement by a doctoral-level behavior analyst who has the expertise to detect, analyze and manage subtle aspects of the assessment and treatment process that often determine the success or failure of intervention. A doctoral-level behavior analyst also has the ability, as well as the responsibility, to insure that all individuals who participate in the delivery of treatment or who provide support services are trained in the methods of intervention, to assess the competence of individuals who assume subsequent responsibility for treatment, and to provide consultation and follow-up services as needed.”

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