This included passing regular education without assistance, making and maintaining friends, and becoming self-sufficient as adults.
These gains were maintained as reported in the 1993 study, "Long-Term Outcome for Children With Autism Who Received Early Intensive Behavioral Treatment".
Behavior analysts also emphasize that the science of behavior must be a natural science as opposed to a social science. In 1968, Baer, Bijou, Risley, Birnbrauer, Wolf, and James Sherman joined the Department of Human Development and Family Life at the University of Kansas, where they founded the Journal of Applied Behavior Analysis.
Further information: Radical behaviorism, Experimental analysis of behavior, Behavior modification, Operant conditioning, B. Lovaas established the UCLA Young Autism Project while teaching at the University of California, Los Angeles, and devoted nearly half a century to groundbreaking research and practice aimed at improving the lives of children with autism and their families.
If a behavior is followed closely in time by a stimulus and this results in an increase in the future frequency of that behavior, then the stimulus is a positive reinforcer.
If the removal of an event serves as a reinforcer, this is termed negative reinforcement.
Over the years, "behavior analysis" gradually superseded "behavior modification"; that is, from simply trying to alter problematic behavior, behavior analysts sought to understand the function of that behavior, what antecedents promote and maintain it, and how it can be replaced by successful behavior.
This analysis is based on careful initial assessment of a behavior's function and a testing of methods that produce changes in behavior.
Respondent (classical) conditioning is based on innate stimulus-response relationships called reflexes.
In his famous experiments with dogs, Pavlov usually used the salivary reflex, namely salivation (unconditioned response) following the taste of food (unconditioned stimulus).