When two paradigms meet: Does evaluative learning extinguish in differential fear conditioning?
When two paradigms meet: Does evaluative learning extinguish in differential fear conditioning?
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DOI：
10.1016/j.lmot.2007.03.003
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发表时间：
2008-02-01
影响因子：
1.4
通讯作者：
Wilhelm, Frank H.
中科院分区：
文献类型：
--
作者：
Blechert, Jens;Michael, Tanja;Wilhelm, Frank H.
巴甫洛夫条件反射的当代理论提出了信号学习（SL）和评估学习（EL）之间的区别，其中条件刺激（CS）成为具有生物学意义的非条件刺激（US）的预测因子，其中US的价态转移到了CS。这种区别主要是基于 EL 和 SL 对灭绝的不同敏感性。本研究比较了使用复杂 CS 的差异恐惧调节设计中 EL（在线价评级）和 SL（美国期望评级和皮肤电导反应，SCR）指数的消退。只有一半的参与者给出了在线化合价评级，这使我们能够确认在线化合价测量不会影响 SCR。与 EL 和 SL 之间的区别一致，SCR 会迅速熄灭，而化合价等级则显示出对熄灭的抵抗力。然而，美国期望评级与效价评级没有区别，这表明 EL 和 SL 的言语指标具有相似的时间进程。 (C) 2007 Elsevier Inc. 保留所有权利。
Contemporary theories of Pavlovian conditioning propose a distinction between signal learning (SL), in which a conditioned stimulus (CS) becomes a predictor for a biologically significant unconditioned stimulus (US), and evaluative learning (EL), in which the valence of the US is transferred to the CS. This distinction is based largely on the different susceptibilities of EL and SL to extinction. This study compared the extinction of indices of EL (online valence ratings) and SL (US-expectancy ratings and skin conductance responses, SCRs) in a differential fear conditioning design using complex CSs. Only half of the participants gave online valence ratings, allowing us to confirm that online valence measurement did not influence SCRs. In line with the distinction between EL and SL, SCRs extinguished rapidly while valence ratings showed resistance to extinction. US-expectancy ratings, however, were not distinguishable from valence ratings indicating that verbal indicators of EL and SL share a similar time course. (C) 2007 Elsevier Inc. All rights reserved.