Occasion setting is specific to the CS-US association
Occasion setting is specific to the CS-US association
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DOI：
10.1016/j.lmot.2006.08.003
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发表时间：
2007-08-01
影响因子：
1.4
通讯作者：
Bonardi, Charlotte
中科院分区：
文献类型：
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作者：
Bonardi, Charlotte
在实验1中，老鼠接受了辨别训练，其中一个时机设定者A发出信号，（条件刺激，CS），x，将遵循一个结果，p（无条件刺激，US），第二个CS，y，由不同的结果，q（x -> p和y -> q）;第二时机设定器B用信号通知反向CS-结果关系（x -> q和y -> p）。在随后的阶段，动物被分成两组，并像以前一样训练，除了A和B都与新的时机设定器C混在一起。对于S组（相同），A和B之后的CS-结果关系与训练前阶段相同，而在D组（不同）中，它们相反。在随后的测试中，刺激C被证明是一个更有效的场合设置在D组比S组。在实验2中，对大鼠进行了负向的回避设置辨别训练，其中CS x表示结果p，y表示结果q;当x和y由场合集合A表示时，则没有结果（x -> p，y -> q，A：x-，A：y-）。在随后的阶段，A现在是一个积极的场合设置者，发出x和y的强化信号。在S组中，x和y表示与先前训练阶段相同的结果（x-，y-，A：x -> p和A：y（->）q），而在D组中表示相反的结果（x，y，A：x -> q和A：1 y-> p）;后一组的测试性能更有效。这些结果表明，每个时机设定器传达了在其存在下配对的CS和US的特定组合的信息（即，x -> p和y -> q，或x ->无p -> y ->无q）。这些结果是一致的建议，场合设置操作，至少部分，在一个特定的CS-US协会。(C)2006年爱思唯尔公司All rights reserved.
In Experiment 1, rats were trained on a discrimination in which one occasion setter, A, signaled that one cue (conditioned stimulus, CS), x, would be followed by one outcome, p (unconditioned stimulus, US), and a second CS, y, by a different outcome, q (x -> p and y -> q); a second occasion setter, B signalled the reverse CS-outcome relations (x ->) q and y -> p). In a subsequent stage, the animals were divided into two groups, and trained as before, except that both A and B were presented in compound with a novel occasion setter, C. For Group S (same) the CS-outcome relations following A and B were identical to those in the pretraining stage, whereas in Group D (different) they were reversed. In a subsequent test, stimulus C was shown to be a more effective occasion setter in Group D than in Group S. In Experiment 2, rats were trained on a negative occasion-setting discrimination in which CS x signaled outcome p, and y outcome q; when x and y were signaled by the occasion set-A then no outcome followed (x -> p, y -> q, A:x-, and A:y-). In a subsequent stage, A was now as a positive occasion setter, signaling reinforcement of x and y. In Group S, x and y signaled same outcomes as in the prior training stage (x-, y-, A:x -> p, and A:y (->) q), whereas in Group D signaled the opposite outcomes (x, y, A:x -> q, and A:1y -> p); more efficient test performance seen in the latter group. These results suggest that the each occasion setter conveyed information the specific combination of CS and US paired in its presence (i.e., x -> p and y -> q, or x -> no p -> y -> no q). These results are consistent with the suggestion that occasion setters operate, at least part, on a specific CS-US association. (C) 2006 Elsevier Inc. All rights reserved.