50-kHz vocalization subtypes emitted by male rats anticipating a sexual partner: lack of effect of amphetamine withdrawal

The experiment tested 32 male rats as they anticipated access to a sexually-receptive female rat. USV recordings were taken during the 2-min pre-access period before the male was allowed restricted interaction with the female. The USV recordings were analyzed for the test days 1, 2, 4, 6, 8.