Johanson I B, Hall W G, Polefrone J M
Dev Psychobiol. 1984 Jul;17(4):357-81. doi: 10.1002/dev.420170404.
Components of rat pups' ingestive responses to orally infused milk came to be elicited by a novel odor conditioned stimulus (cedar) that had been repeatedly paired with milk infusions (Experiment I). Pups responded specifically to one odor, and they did not generalize their conditioned responding to either another odor or an unscented airstream (Experiment II). Ingestive responses could also be conditioned to a vibrotactile CS paired with milk, although levels of conditioned responding were lower than were obtained with an odor CS (Experiment III). Pups' internal state determined the effectiveness of training, in that pups that were removed from their dam for 24 hr showed reliable conditioned responding, while nondeprived pups and dehydrated pups did not (Experiment IV). Finally, pups showed retention of conditioned responding for at least several days after training (Experiment V).
新生大鼠对经口灌注牛奶的摄食反应的组成部分，开始由一种新的气味条件刺激（雪松）引发，该刺激曾与牛奶灌注反复配对（实验一）。幼崽对一种气味有特异性反应，且不会将其条件反应泛化到另一种气味或无味气流上（实验二）。摄食反应也可以被条件化到与牛奶配对的振动触觉条件刺激上，尽管条件反应的水平低于气味条件刺激所获得的水平（实验三）。幼崽的内部状态决定了训练的效果，即被从母鼠身边移开24小时的幼崽表现出可靠的条件反应，而未被剥夺的幼崽和脱水的幼崽则没有（实验四）。最后，幼崽在训练后至少几天内都保持了条件反应（实验五）。
