Bonardi Charlotte, Hall Geoffrey, Ong Siaw Yann
University of York, York, UK.
Q J Exp Psychol B. 2005 Apr;58(2):141-62. doi: 10.1080/02724990444000087.
In Experiments 1 and 2 rats received uncorrelated presentations of a light conditioned stimulus (CS) and a food unconditioned stimulus (US) on each day of a preexposure phase. Control subjects received the same number of USs during the first half of preexposure and the same number of CSs during the second. Uncorrelated preexposure retarded inhibitory conditioning. Experiment 3 showed, however, that the different patterns of US preexposure experienced by the two groups could in itself influence the course of subsequent inhibitory conditioning. When this factor was equated by restricting the uncorrelated treatment to the first half of the pre-exposure phase (Experiment 2) or by extending the control treatment throughout the phase (Experiment 4) it was found that uncorrelated preexposure retarded excitatory conditioning, but facilitated inhibitory conditioning. This outcome challenges an interpretation in terms of the concept of learned irrelevance, which predicts that uncorrelated preexposure should retard both forms of conditioning.
在实验1和实验2中，大鼠在预暴露阶段的每一天接受光条件刺激（CS）和食物非条件刺激（US）的不相关呈现。对照组在预暴露的前半段接受相同数量的非条件刺激，在后半段接受相同数量的条件刺激。不相关的预暴露延迟了抑制性条件作用。然而，实验3表明，两组经历的不同非条件刺激预暴露模式本身可能会影响随后抑制性条件作用的进程。当通过将不相关处理限制在预暴露阶段的前半段（实验2）或通过在整个阶段扩展对照处理（实验4）来使这个因素相等时，发现不相关预暴露延迟了兴奋性条件作用，但促进了抑制性条件作用。这一结果挑战了基于习得无关性概念的一种解释，该解释预测不相关预暴露应该延迟两种形式的条件作用。
