Controllability/uncontrollability of aversive stimuli and emotion

本研究旨在探讨外感反馈刺激对条件性情绪反应(CER)和基础情绪水平(BEL)这两个受试者因不可避免的电击而产生的恐惧的抑制作用。在两个大鼠实验中，我们采用了三组设计(MASTER(M)，YOKD(Y)，YOKED-RESERVICATION(YF))，在条件舔舔抑制范式中进行了羽毛球回避准备。在最小试验间隔为30s的实验1中，M组和YF组的BEL低于Y组。在最小试验间隔为5s的实验2中，M组的BEL比Y组和YF组的BEL少。这些结果表明，反馈刺激的恐惧缓解效应取决于其抑制性，可控性和用力感觉反馈刺激对BEL的影响存在不同的潜在机制。

The present research was designed to investigate an attenuating effect of an exteroceptive feedback stimulus on fear from inescapable shock in the two acpects ; Conditioned emotional response (CER) and Basal emotional level (BEL). In two experiments with rats, we employed the triadic design (Groups master (M), yoked (Y), yoked-feedback (YF) in conditioned licking suppression paradigm with shuttlebox avoidance preparation. In Experiment 1, in which minimum inter-trial interval was 30s, Group M and YF demonstrated less BEL than Group Y.In Experiment 2, which minimum inter-trial interval was 5s, Group M demonstrated less BEL than Group Y and YF.These results suggests that fear-attenuating effect of feedback stimulus depends on its inhibitory property, and that there are different underlying mechanisms between the effect of controllability and the effect of exeroceptive feedback stimulus on BEL.In terms of CER,however, we acquired little information because the measure we employed was not appropriate.