Amount of training effects in representation-mediated food aversion learning: No evidence of a role for associability changes
Amount of training effects in representation-mediated food aversion learning: No evidence of a role for associability changes
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DOI：
10.3758/bf03193185
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发表时间：
2005-11-01
影响因子：
1.8
通讯作者：
Holland, PC
中科院分区：
文献类型：
--
作者：
Holland, PC
当之前训练过的食物信号与毒素配对时，老鼠会对食物颗粒产生厌恶，但只有在最低限度的信号食物训练之后。经过广泛的信号-食物训练后，信号-毒素配对对食物消耗没有影响，即使在增强信号关联性的操作之后也是如此。相比之下，经过大量训练后，对信号的条件反应保留了对食物-毒素配对导致的食物强化剂贬值的敏感性。这些结果表明，关联激活的事件表征的性质在训练过程中发生了变化。
Rats acquired aversions to food pellets when a previously trained signal for that food was paired with a toxin, but only after minimal signal-food training. After extensive signal-food training, signal-toxin pairings had no effect on food consumption even after manipulations that enhanced the associability of the signal. By contrast, conditioned responding to the signal retained its sensitivity to devaluation of the food reinforcer by food-toxin pairings after extensive training. These results suggest that the nature of associatively activated event representations changes over the course of training.