Has done the only research on wolf and bison interactions. Has studied Hereford cattle in an effort to help ranchers protect their livestock against wolves in a natural way. Studies how hormones alter the nervous system and how that affects behavior. Has published articles on neural and hormonal control of sexual behavior and aggression in animals. Is a consulting editor of the journal Hormones and Behavior.
Current research focuses on neural network in the rat stomach.
Has found that nerves control some feeding processes. Co-chair of the American Orthopsychiatric Association's study group on racism. Examines the factors that prompt parents to seek professional help for their children. Says genetics play only a small role in intelligence and behavior. Teaches course about intelligence, or IQ, tests.