Key-pressing responses in the cat were maintained under conditions in which brief electric shock was first postponed by responses (avoidance), then periodically presented independently of responses, and finally produced by responses on a fixed-interval schedule of 15 min (FI 15-min). A steady rate of responding occurred under shock avoidance and under response-independent shock; positively accelerated responding was engendered by the FI 15-min schedule. A second experiment studied responding under second-order schedules composed of three FI 5-min components. Responding was suppressed when a stimulus was presented briefly at completion of each FI 5-min component and a shock followed the brief stimulus at completion of the third component. Responding was maintained when each of the first two components was completed either with or without presentation of a brief stimulus and a shock alone was presented at completion of the third FI 5-min component.
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机译:猫的按键反应保持在以下条件下:短暂的电击首先被响应(避免)所延迟,然后周期性地独立于响应而呈现,最后以固定间隔15分钟的响应产生(FI 15-分钟)。在避免电击和独立于反应的电击下,稳定的响应速度发生了。 FI 15分钟的时间表可以带来积极加速的响应。第二项实验研究了由三个FI 5分钟组成的二阶计划下的响应。当在每个FI 5分钟组成部分短暂完成刺激时,反应受到抑制,而在完成第三部分时短暂刺激之后出现电击。当完成前两个组件中的每个组件时,无论是否出现短暂刺激,都保持了响应,而在第三个FI 5分钟组件结束时,仅出现了电击。
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