Imagine that! Cue-evoked representations guide rat behavior during ambiguous situations.
Imagine that! Cue-evoked representations guide rat behavior during ambiguous situations.
复制标题
DOI：
10.1037/xan0000093
复制
发表时间：
2016-04
期刊：
影响因子：
--
通讯作者：
Blaisdell AP
中科院分区：
文献类型：
--
作者：
Fast CD;Biedermann T;Blaisdell AP
心理意象涉及对一个事件的类似感知的体验，而这个事件并不存在于物理上，也不被感官检测到。报告说，大鼠使用联想检索事件的表征来指导模棱两可的情况下的行为。大鼠在两个灯之一，但不是两个灯的压力，加强。然后用一盏灯照明，而第二盏灯被不透明的屏蔽物覆盖（模糊不清）或未覆盖且未点亮（明确不存在）进行测试。当第二盏灯被遮住时，老鼠的压力比不亮的时候小，这表明模糊不清的光线引导了它们的行为。然而，提供了一种替代机制，其中明确缺乏线索在训练过程中获得关联值。在测试中覆盖光线可以有效地去除这些关联属性，从而导致行为的泛化衰减。目前的实验旨在测试这两个帐户所做的对比预测。实验1经验性地建立了当复合线索的一个元素在测试中单独呈现时，可以发生泛化递减，但是当缺席的元素被覆盖时，这种递减被衰减，而不是增强。实验2利用条件抑制程序，以证明大鼠的行为在线索歧义是由一个联想检索的代表，而不是由泛化递减。总的来说，结果反对一个纯粹的非代表性的联想帐户的行为和支持的作用，联想检索表示在大鼠。
Mental imagery involves the perceptual-like experience of an event that is not physically present, or detected by the senses. reported that rats use the representation of an associatively-retrieved event to guide behavior in ambiguous situations. Rats were reinforced for lever-pressing during one of two lights but not both lights. They were then tested with one light illuminated while the second light was either covered by an opaque shield (ambiguous) or uncovered and unlit (explicitly absent). Rats lever-pressed less when the second light was covered compared to unlit, suggesting that a representation of the ambiguously absent light guided their behavior. However, offered an alternative mechanism in which the explicit absence of a cue gains associative value during training. Covering the light at test could effectively remove these associative properties, resulting in a generalization decrement of behavior. The current experiments were designed to test contrasting predictions made by these two accounts. Experiment 1 empirically established that generalization decrement can occur when an element of a compound cue is presented alone at test, but this decrement is attenuated, rather than enhanced, when the absent element is covered. Experiment 2 utilized a conditioned inhibition procedure to demonstrate that rat behavior during cue ambiguity is driven by an associatively-retrieved representation rather than by generalization decrement. Collectively, the results argue against a purely non-representational associative account of behavior and support a role for associatively-retrieved representations in rats.