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Published Online:https://doi.org/10.1176/ajp.125.11.1531

Chimpanzees reared during early life in environments with social and perceptual restrictions are strikingly different from animals reared by their mothers in a natural habitat. As adolescents they avoid social contact and display little species-typical behavior; they play and copulate infrequently and do not groom. The authors found these aberrations to be very resistant to modification by a variety of maneuvers, including contact with normal social partners, drugs, and experimental manipulations, and they discuss the implications of their lack of "therapeutic" success.

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