权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

The study on interaction between habituation and latent inhibition effect

习惯化与潜在抑制效应交互作用研究

基本信息

批准号：
08610079
负责人：
ISHII Kiyoshi
金额：
$ 1.41万
依托单位：
NAGOYA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1998
项目状态：
已结题

项目摘要

Using rats as the subjects, this project aimed to find the possible interactions between latent inhibition and habituation effects, both of which are produced by stimulus preexposure.Using the conditioned suppression paradigm, the first study examined the effects of of a second (distractor) stimulus added either during preexposure or during conditioning, on the degree of latent inhibition to the target. Addition of the distractor during conditioning attenuated latent inhibition to the target, while addition of it during preexposure did not. These results suggest that in the conditioned suppression with the stimuli from different modalities, the added distractor functions to disrupt the habituation process of the preexposed stimulus.On the other hand, the second study which aimed to reexamine the same effect by using the conditioned flavor-aversion paradigm showed that it was rather the distractor added during preexposure which attenuated latent inhibition to the target. In this paradigm, addition of the distractor during conditioning had no effect. It was suggested that in this paradigm addition of the distractor causes the generalization decrement.The third study explored the effects of duration and amount of the presentation of the flavor on both the habituation and latent inhibition effects. It was found that neither the duration nor the amount of flavor solution presented affected the degree of habiutation shown on the test. On the other hand, the duration but not the amount of the presentation of conditioned stiumulus determined the degree of the latent inhibition effect : the longer the duration, the more salient of the latent inhibition effect was found.

本研究以大鼠为被试，采用条件抑制实验范式，考察了在刺激预暴露或条件反射过程中加入第二个干扰物（分心物）刺激，对靶刺激的潜伏抑制程度的影响，以探讨刺激预暴露产生的潜伏抑制效应和习惯化效应之间可能存在的相互作用。在条件反射过程中加入干扰物会减弱对目标的潜在抑制，而在预暴露过程中加入干扰物则不会。这些结果表明，在不同刺激形式的条件抑制中，干扰物的加入破坏了对预暴露刺激的习惯化过程。另一方面，第二项研究采用条件性味觉厌恶范式重新检验了同样的效应，结果表明，正是预暴露过程中加入的干扰物减弱了对目标的潜在抑制。在这个范例中，在条件反射过程中加入干扰物没有效果。研究三探讨了气味呈现的时间和数量对习惯化和潜在抑制效应的影响。已发现，所呈现的风味溶液的持续时间和量均不影响测试中所示的习惯程度。另一方面，条件刺激呈现的持续时间而不是量决定了潜伏抑制效应的程度：持续时间越长，潜伏抑制效应越显著。