Wilson C L, Sherman J E, Holman E W
J Exp Psychol Anim Behav Process. 1981 Apr;7(2):165-74.
Rats were trained to press a bar for sucrose solution delivered by a dipper; they then received pairings of sucrose and lithium chloride (LiCl) in the home cage and were tested for bar pressing. In the first and second experiments, the conditioned aversion to sucrose had no effect on unreinforced bar pressing in the test, but the aversion reduced bar pressing reinforced either by sucrose or by the operation of the empty dipper. In the third and fourth experiments, presses during training were reinforced by sucrose only in the presence of an audiovisual discriminative stimulus; in the test, the aversion to sucrose reduced pressing reinforced by the discriminative stimulus, but the aversion had no effect on unreinforced pressing in either the presence or the absence of the discriminative stimulus. Thus, pairings of sucrose and LiCl reduced the reinforcing value of sucrose and also of a stimulus previously paired with sucrose, but they had no effect of an instrumental response previously reinforced by sucrose or on the discriminative properties of a stimulus paired with sucrose.
大鼠经过训练，通过按压杠杆获取由小勺递送的蔗糖溶液；随后，它们在饲养笼中接受蔗糖与氯化锂（LiCl）的配对，并接受杠杆按压测试。在第一个和第二个实验中，对蔗糖的条件性厌恶对测试中未强化的杠杆按压没有影响，但这种厌恶减少了由蔗糖或空小勺操作强化的杠杆按压。在第三个和第四个实验中，训练期间的按压仅在存在视听辨别刺激时由蔗糖强化；在测试中，对蔗糖的厌恶减少了由辨别刺激强化的按压，但这种厌恶对在有或没有辨别刺激情况下的未强化按压均无影响。因此，蔗糖与LiCl的配对降低了蔗糖以及先前与蔗糖配对的刺激的强化值，但对先前由蔗糖强化的工具性反应或与蔗糖配对的刺激的辨别特性没有影响。
