HEFFERLINE R F, KEENAN B, HARFORD R A
Science. 1959 Nov 13;130(3385):1338-9. doi: 10.1126/science.130.3385.1338.
An invisibly small thumb-twitch increased in rate of occurrence when it served, via electromyographic amplification, to terminate or postpone aversive noise stimulation. Subjects remained ignorant of their behavior and its effect. Their cumulative response curves resembled those obtained in similar work with animals. Other subjects, informed of the effective response, could not produce it deliberately in a size small enough to qualify for reinforcement.
当通过肌电图放大，一个小到几乎看不见的拇指抽搐动作用于终止或推迟厌恶噪声刺激时，其出现频率增加。受试者对自己的行为及其影响一无所知。他们的累积反应曲线类似于在对动物进行的类似研究中获得的曲线。其他被告知有效反应的受试者，无法故意做出小到足以获得强化的动作。
