Coordinated responses of 5 dyads of rats were investigated under fixed‐ratio (FR) schedules of mutual water reinforcement. Coordinated responding was defined as 2 consecutive lever‐presses, 1 from each of 2 rats, occurring <.5 s apart. In the FR schedules, each coordinated episode was defined as 1 response in the FR sequence. The size of FR schedules was parametrically manipulated assuming the values of FR 1, 6, 12, 18, 24, 30, 50, and 9, in this order. Each FR remained in effect until responding reached stability. Under all conditions, pairs of rats received access to water simultaneously (mutual reinforcement). Rates and proportions of coordinated responding showed a bitonic inverted U‐shaped function of ratio size. Postreinforcement pauses increased systematically as the interreinforcement interval increased. Local rates and proportions increased as a function of response location within ratios. Results of a control condition with relaxed temporal constraints for mutual reinforcement showed decreases in rates and proportion of coordinated responses, suggesting that the coordinated responses were controlled by the mutual reinforcement contingencies. The present experiment showed that coordinated responding is quantitatively affected by 3 properties of FR schedules: response requirement, reinforcement rates, and proximity to reinforcement.

中文翻译：

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大鼠的协同反应：II。在固定比例的相互强化时间表上的表现

在相互补水的固定比率 (FR) 计划下研究了 5 对大鼠的协调反应。协调响应定义为 2 次连续的杠杆按压，2 只大鼠各 1 次，间隔 <.5 秒。在 FR 计划中，每个协调的事件被定义为 FR 序列中的 1 个响应。假设 FR 1、6、12、18、24、30、50 和 9 的值，按此顺序对 FR 计划的大小进行参数化操作。每个 FR 保持有效，直到响应达到稳定。在所有条件下，成对的大鼠同时获得水（相互强化）。协调响应的比率和比例显示出比例大小的双音倒 U 形函数。随着强化间隔的增加，强化后暂停有系统地增加。本地比率和比例随着比率内响应位置的变化而增加。具有放松相互强化时间约束的控制条件的结果显示协调反应的速率和比例下降，表明协调反应受相互强化偶然性的控制。本实验表明，协调响应受到 FR 计划的 3 个属性的定量影响：响应要求、强化率和接近强化。