Discrete Trials were originally used in experimental studies with animals to demonstrate how learning was influenced by rates of reinforcement. The Lovaas program was developed by Ivaar Lovaas at the University of California and adapted as a therapy for developmentally delayed children and children with Autism. Ivar Lovaas has used discrete training trials to help children learn skills ranging from making eye contact and following simple instructions, to developing advanced language and social skills.
Discrete training trials are based on the principles of Applied Behavior Analysis - children will be more likely to adopt behaviors when rewarded, and are less likely to adopt inappropriate behaviors for which they receive no reward or possibly a negative outcome. Lovaas programs are only run by practitioners who have been trained by the Lovaas Institute. The program is highly intensive with 40 hours or more spent each week with children on the autism spectrum.