Learning about the CS during latent inhibition: Preexposure enhances temporal control.
Learning about the CS during latent inhibition: Preexposure enhances temporal control.
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DOI：
10.1037/xan0000096
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发表时间：
2016-04
期刊：
影响因子：
--
通讯作者：
Jennings DJ
中科院分区：
文献类型：
--
作者：
Bonardi C;Brilot B;Jennings DJ
在三个实验中，大鼠被给予非强化的预先暴露在听觉刺激下，然后这个刺激和第二个新的线索与食物配对。在三个实验中，观察到对预先暴露的刺激的条件反应率较低，这表明潜在的抑制。动物使用这些线索来计算送餐时间的程度也得到了检验。矛盾的是，预先暴露的刺激的反应斜率--表明在条件刺激的整个过程中反应的增加速度--比新线索的反应斜率更大，这与预先暴露的刺激施加了更大的时间控制的暗示一致。此外，无论线索在预暴露期间的持续时间是否不同于在条件反射期间的持续时间，情况都是如此。这些结果表明，尽管条件性刺激预暴露延缓了条件反射，但它可能会增强时机。这些发现是根据当前的条件作用和时机模型进行讨论的。
In 3 experiments, rats were given nonreinforced preexposure to an auditory stimulus, after which this stimulus and a second, novel cue were paired with food. Lower rates of conditioned responding were observed to the preexposed stimulus across the 3 experiments, indicative of latent inhibition. The degree to which animals used these cues to time the occurrence of food delivery was also examined. Paradoxically, the response slopes—indicating the rate of increase in responding over the course of the conditioned stimulus—were greater for the preexposed than for the novel cues, consistent with the suggestion that the preexposed stimulus exerted greater temporal control. Moreover, this was the case irrespective of whether the duration of the cue during preexposure differed from that during conditioning. These results suggest that although conditioned stimulus preexposure retards conditioning, it may enhance timing. The findings are discussed in terms of current models of conditioning and timing.