A comprehensive guide to Applied Behavior Analysis — what it is, how it works, and who recommends it
Applied Behavior Analysis (ABA) is a scientific approach to understanding behavior and how it is affected by the environment. ABA uses principles of learning and motivation to teach new skills, improve socially significant behaviors, and reduce behaviors that may be harmful or interfere with learning.
ABA is not a single technique — it is a broad field of practice that encompasses many strategies and methods. What makes ABA unique is its commitment to measurable outcomes: every intervention is tracked with data, every program is individualized, and every decision is guided by evidence.
ABA is recognized as an evidence-based treatment for Autism Spectrum Disorder by the American Academy of Pediatrics, the U.S. Surgeon General, the American Psychological Association, and the National Institute of Mental Health.
B.F. Skinner published "The Behavior of Organisms," establishing the principles of operant conditioning that would become the scientific foundation of ABA. His work demonstrated that behavior is shaped by its consequences — reinforcement increases behavior, while punishment decreases it.
Dr. O. Ivar Lovaas at UCLA began applying behavioral principles to help children with autism. His pioneering work demonstrated that structured, intensive behavioral intervention could produce meaningful developmental progress in children previously thought untreatable.
O. Ivar Lovaas published the first controlled study of intensive early behavioral intervention for young autistic children. It is a landmark in the history of the literature because it changed what families and physicians believed was possible, and because the debate it opened — about its methods, its measures and its use of aversive procedures — shaped the field that followed. It is history, not a description of the results any individual child should expect from ABA today.
The Behavior Analyst Certification Board (BACB) was established to ensure quality standards in the field, creating the BCBA (Board Certified Behavior Analyst) and BCaBA credentials that define today's professional standards.
Today's ABA is play-based, child-led, and compassionate. Modern practitioners use naturalistic teaching strategies, incorporate the child's interests, and prioritize socially meaningful goals. ABA is covered by insurance in all 50 states and endorsed by every major medical organization.
Every session is measured. ABA therapists collect data on every target behavior, track trends over time, and use that data to make objective decisions about whether a program is working or needs adjustment.
Discrete Trial Training (DTT)A structured teaching method that breaks complex skills into small, discrete steps. Each "trial" has a clear beginning (instruction), middle (child's response), and end (consequence/reinforcement). DTT is highly effective for teaching:
Teaching occurs in natural, everyday environments using the child's own motivation and interests. Rather than sitting at a table, the therapist follows the child's lead during play, meals, or outings. NET is ideal for:
PRT targets "pivotal" areas of development — motivation, responsiveness to multiple cues, self-management, and social initiations. Improvements in these pivotal areas lead to broad improvements across many behaviors. Key features include:
Additional Methods
Board Certified Behavior Analyst — holds a master's degree or higher, extensive supervised clinical hours, and national board certification. The BCBA designs the treatment plan, sets goals, trains the team, and oversees all aspects of care.
Board Certified Assistant Behavior Analyst — holds a bachelor's degree with specialized coursework and works under the supervision of a BCBA. Assists with program implementation and data analysis.
Registered Behavior Technician — completes specialized training and certification to implement the treatment plan directly with the client. RBTs work one-on-one, carrying out the daily therapy sessions designed by the BCBA.
Where ABA Takes Place
Typical Treatment Structure