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

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Marian Breland was indeed one of the first psychologists to use positive reinforcement for teaching basic self-help skills to individuals with developmental disabilities, as well as for training marine mammals for the U.S. Navy.

Marian Breland Was One of the First Psychologists to Use