Unified understanding of retarding and facilitating effect of stimulus preexposure

采用条件性味觉厌恶程序，以大鼠为被试，探讨了条件刺激（CS）预暴露促进而非阻碍条件性厌恶获得的条件。当自来水被用作CS与动物保持盐水通过实验，预暴露于CS的背景下，而不是实验之一，导致促进收购的厌恶。当盐水而不是CS（自来水）在不同的背景下预暴露时，也获得了相同的效果。简单的预先暴露在没有呈现液体的情境中没有效果。我们还研究了熟悉一种味觉CS对获得情境依赖性厌恶的影响。实验结果表明，只有当受试者在他们的家笼子里的流体是相同的CS通过实验，条件反射的情况下成立的场合设置为获得性厌恶CS。另一方面，当动物保持与CS不同的液体时，发现条件反射与厌恶事件直接相关。

Using conditioned taste-aversion procedure and rats as the subjects, conditions under which preexposure to conditioned stimulus (CS) facilitates but not retards subsequent acquisition of conditioned aversion were explored. When tap water was used as the CS with animals maintained by salt water through the experiment, preexposure to CS in a context other than experimental one resulted in facilitation of the acquisition of aversion. The same effect was also obtained when salt water rather than CS (tap water) was preexposed in a different context. Simple preexposure to that context without presenting fluid had no effect.The effect of familiarity of a taste CS on the acquisition of context-dependent aversion was also studied. The results of the experiments suggested that only when subjects were given in their home cages a fluid that was identical to the CS through the experiment, conditioning context was established as the occasion setter for the acquired aversion to the CS. When animals were maintained with a fluid that differed from CS, on the other hand, it was found that conditioning context directly associated with the aversive event.