The role of injection cues in the associative control of the US pre-exposure effect in flavour aversion learning.

Isabel de Brugada, Felisa González, Antonio Cándido
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引用次数: 20

Abstract

Two experiments, using rats as subjects, examined the role of contextual cues in producing the unconditioned stimulus (US) pre-exposure effect in conditioned taste aversion. Experiment 1 showed a significant US pre-exposure effect, when the pre-exposure was conducted in a familiar context, and that a change of context between the pre-exposure and conditioning phases did not attenuate this effect. Experiment 2 demonstrated that extinction of injection-related cues after the pre-exposure stage attenuated the US pre-exposure effect, when the pre-exposure was conducted in either a familiar or a novel context. Taken together, these results support the associative explanation of the US pre-exposure effect in terms of blocking, incorporating a role for injection-related cues in the context blocking analysis of the US pre-exposure effect.

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注射线索在味道厌恶学习中US预暴露效应联想控制中的作用。
两个实验以大鼠为实验对象,研究了情境线索在条件性味觉厌恶中产生无条件刺激(US)预暴露效应中的作用。实验1显示,当预暴露在熟悉的情境中进行时,存在显著的US预暴露效应,并且在预暴露阶段和条件反射阶段之间的情境变化不会减弱这种效应。实验2表明,无论是在熟悉的环境中还是在新的环境中进行预暴露,预暴露阶段后注射相关线索的消失都会减弱US预暴露效应。综上所述,这些结果支持了US预暴露效应在阻断方面的关联解释,并将注射相关线索纳入US预暴露效应的上下文阻断分析中。
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