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Science 26 July 1974:
Vol. 185. no. 4148, pp. 374 - 376
DOI: 10.1126/science.185.4148.374
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Articles

Modulation of the Copulatory Sequence of the Male Rat by a Schedule of Reinforcement

Alan Silberberg 1 and Norman Adler 2

1 Department of Psychology, American University, Washington. D.C. 20016
2 Department of Psychology, University of Pennsylvania, Philadelphia 19104

Copulating male rats were permitted a maximum of seven intromissions in which to ejaculate. This experimental constraint of the male rat's sexual behavior produced an increase in the number of sessions in which the male ejaculated before the seventh intromrission. This species-specific behavior pattern is therefore susceptible to environmental conditioning.


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