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

Science  26 Jul 1974:
Vol. 185, Issue 4148, pp. 374-376
DOI: 10.1126/science.185.4148.374


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.