Bond N W
Physiol Behav. 1979 Nov;23(5):839-43. doi: 10.1016/0031-9384(79)90187-2.
Two experimental groups of undergraduate volunteers received five classical aversive conditioning trials with a tone conditioned stimulus (CS) and shock unconditioned stimulus (UCS). Control groups received either the CS alone or UCS alone. Subjects from one experimental group were subsequently instructed that they would not receive further shocks, while the other experimental group received no such instructions. The CS alone was then presented once to all four groups while subjects were engaged in a button-pressing task maintained by slide reinforcement. During this latter phase rate of button pressing was measured as well as heart rate and pulse volume. The last two measures being employed as indices of autonomic arousal. The results indicated that while instructions as to the absence of the UCS completely abolished the conditioned suppression of button-pressing, they had no effect upon the pulse volume CR. A heart rate CR was not obtained. These results reflect unfavourably upon theoretical formulations of conditioned suppression that emphasize the causal interdependence of motor and autonomic events or the primacy of either one.
两组本科志愿者实验组接受了五次经典厌恶条件反射试验，以音调条件刺激（CS）和电击非条件刺激（UCS）进行。对照组分别只接受CS或只接受UCS。随后，一个实验组的受试者被告知他们不会再受到电击，而另一个实验组没有收到这样的指示。然后，在所有四组受试者参与由幻灯片强化维持的按键任务时，单独呈现一次CS。在这一后期阶段，测量了按键速率以及心率和脉搏容积。后两项测量被用作自主唤醒的指标。结果表明，虽然关于UCS不存在的指示完全消除了对按键的条件性抑制，但它们对脉搏容积条件反应没有影响。未获得心率条件反应。这些结果对强调运动和自主事件因果相互依存或其中任何一个的首要性的条件性抑制理论表述不利。
