Effects of US devaluation on win-stay and win-shift radial maze performance in rats.
Effects of US devaluation on win-stay and win-shift radial maze performance in rats.
复制标题
美国贬值对大鼠获胜停留和获胜转移径向迷宫表现的影响。
DOI：
10.1037//0735-7044.114.2.295
复制
发表时间：
2000
影响因子：
1.9
通讯作者：
Knowlton,BJ
中科院分区：
文献类型：
--
作者：
Sage,JR;Knowlton,BJ
以往的研究表明，在其潜在的神经基板方面，赢得停留和赢得移动径向迷宫学习之间的双重分离。为了考察这两种任务中形成的联想的内容，作者用味觉厌恶来区分刺激-刺激（CS-UCS）和刺激-反应（CS-CR）学习来贬低食物非条件刺激（UCS）。UCS贬值进行了过度或训练不足的大鼠在赢得停留的任务。贬值大大减少了迷宫中的食物消耗，但无论训练量如何，都没有破坏选择的准确性。贬值不影响过度训练大鼠的潜伏期，但增加训练不足大鼠的潜伏期。在胜利转移任务中，贬值导致大鼠拒绝接受刺激，但它们继续准确地胜利转移，但延迟时间明显更长（实验3）。结果表明，S-R协会可能介导的性能后，延长赢得停留培训。相比之下，一个UCS表示似乎是在早期的胜利停留和胜利转移性能召回。（PsycInfo数据库记录（c）2016阿帕，保留所有权利）
Previous studies have shown double dissociations between win–stay and win–shift radial maze learning in terms of their underlying neural substrates. To examine the content of the associations formed in the two tasks, the authors devalued the food unconditioned stimulus (UCS) by taste aversion to differentiate stimulus–stimulus (CS–UCS) and stimulus–response (CS–CR) learning. UCS devaluation was performed in rats that were over-or undertrained on the win–stay task. Devaluation substantially reduced food consumption on the maze but failed to disrupt choice accuracy, regardless of the amount of training. Devaluation did not affect latency in overtrained rats but did increase latency in undertrained rats. In the win–shift task, devaluation caused rats to reject the reinforcer, yet they continued to accurately win–shift, but with significantly longer latencies (Experiment 3). The results suggest that an S–R association may mediate performance after extended win–stay training. In contrast, a UCS representation appears to be recalled during early win–stay and win–shift performance.(PsycINFO Database Record (c) 2016 APA, all rights reserved)