Kelly D D
J Exp Anal Behav. 1980 Mar;33(2):275-84. doi: 10.1901/jeab.1980.33-275.
Classical pairings of a sound stilulus with shock elicited larger magnitude and more rapidly conditioned autonomic responses when subjects were responding on variable-interval schedules for food than when they were eating freely available food. The difference was not attributable to changes in control values of heart rate and blood pressure, or to alterations in motor activity, but appeared related to operant suppression.
当受试者在可变间隔食物供应时间表上做出反应时,与自由获取食物时相比,将声音刺激与电击进行经典配对会引发更大幅度且更快形成条件反射的自主反应。这种差异并非归因于心率和血压控制值的变化,也不是由于运动活动的改变,而是似乎与操作性抑制有关。