Marian Breland was one of the first psychologists to use positive reinforcement to teach basic self-help skills to people with developmental disabilities and also helped train marine mammals for the U.S. Navy.

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Marian Breland was known for her work in behaviorism and animal training, particularly with the use of positive reinforcement techniques. She and her husband Keller Breland founded Animal Behavior Enterprises, which participated in a project for the U.S. Navy to train dolphins for various tasks. Breland also applied behaviorist principles to human learning, particularly for individuals with developmental disabilities.

Marian Breland Was One of the First Psychologists to Use