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American Zoologist 1966 6(4):663-668; doi:10.1093/icb/6.4.663
© 1966 by The Society for Integrative and Comparative Biology
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Reinforcement of Intra- and Inter-Species Aggression with Intracranial Stimulation

THOMAS J. STACHNIK, ROGER ULRICH and JOHN H. MABRY
Intracranial stimulation was used as a reinforcer to condition fighting in paired rats. Stimulation for an implanted animal was made contingent upon responses which successively approximated those typical of attack. A stable pattern of aggression developed, the maintenance of which was possible on intermittent reinforcement schedules although at depressed frequencies. An implanted rat also readily initiated contact with a cat and made consistent, aggressive approaches toward a squirrel monkey. The aggression observed appeared to be a function of operant reinforcement since extinction occurred when the intracranial stimulation contingency was removed.


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