What is ABA

What Is Applied Behavior Analysis (ABA) and Verbal Behavior (VB)?

ABA is the science of human behavior. Its origins date back to the 1930s through the work of Dr. B. F. Skinner. In 1938, Skinner published his book The Behavior of Organisms, where he described how people learn from the consequences of their actions. This process is known as operant conditioning.

This means that if a behavior is followed by something positive, there is a higher likelihood that the behavior will be repeated. Conversely, if a behavior results in an unpleasant consequence, it becomes less likely to occur again in the future. Skinner also described the events that take place before a behavior, known as antecedents, and highlighted their importance in understanding behavior and the consequences that follow it. From this work, the ABC model emerged as a core framework of behavior analysis: A stands for antecedent, what happens before the behavior; B stands for behavior, the observable action; and C stands for consequence, what happens immediately after the behavior

Verbal behavior

Applied Behavior Analysis (ABA) is an evidence‑based approach that involves a thorough analysis of behavior and the relationship between behavior and the surrounding environment. It is grounded in the understanding that an individual’s behavior is influenced by the conditions that occur before and after it. It’s called the ABC model. ABA uses a variety of principles and teaching techniques, including motivation, stimulus control, reinforcement, punishment, extinction, intensive teaching (ITT), natural environment teaching (NET), as well as prompting, shaping, and chaining.

Verbal Behavior (VB), a branch of behavior analysis, is based on the idea that language is learned behavior. It is acquired, expanded, and maintained through the same environmental variables and principles, such as stimulus control, motivation, reinforcement, and extinction—that influence nonverbal behavior. VB places strong emphasis on the function of language and the importance of communication.

In 1957, B. F. Skinner published Verbal Behavior, in which he described the functional units of language, called verbal operants. These include mands (requests), tacts (labeling), echoics (vocal imitation), and intraverbals (conversation and answering questions). The focus is on teaching a word within each verbal operant. For example, when a child wants an apple, we teach them to say “apple” (mand). When they see a picture of an apple in a book, we teach them to label it by saying “apple” (tact). When asked, “What grows on a tree?” they respond “apple” (intraverbal). And when someone says “apple,” the child repeats “apple” (echoic).

Useful information

A Safe and Effective Approach

Useful information

Mands are the most important verbal operant and should be taught first. If a child is verbal, vocal communication is developed and expanded. If the child is nonverbal, vocal communication is replaced with an appropriate alternative communication system.

Intervention based on ABA principles is recognized as a safe and effective approach for teaching and supporting children with autism spectrum disorder. ABA techniques help build essential foundational skills such as attention, following simple instructions, and imitation, as well as more complex skills, including reading, conversational language, and understanding emotions.

Target skills are broken down into small, manageable components (task analysis), and each component is taught until it is mastered.

ABA principles and methods

Dr. Ivar Lovaas was among the first to apply ABA principles and methods in working with children with autism in order to scientifically demonstrate their effectiveness. Early versions of ABA programs focused mainly on intensive teaching (ITT/DTT). Modern ABA programs combine ITT, Natural Environment Teaching (NET), and a strong emphasis on Verbal Behavior (VB). This combined model is often referred to as ABA/VB (ABA with verbal behavior).

These programs place significant importance on addressing challenging behavior, collecting data, and promoting generalization. They allow children to learn and practice skills in both structured and natural settings. Research highlights the importance of creating an ABA program that is comprehensive, individualized, intensive, and early. “Comprehensive” means that it targets areas such as communication, play, self‑help skills, and cognitive and social abilities. “Individualized” means that the program is tailored to the specific child, based on assessments of their current abilities and needs. “Early” refers to the recommended age to begin intervention, ideally before the age of four. “Intensive” means that the intervention should be delivered for 25–40 hours per week for a minimum of one to three years.