Conditioning with masked stimuli affects the timecourse of skin conductance responses.
Conditioning with masked stimuli affects the timecourse of skin conductance responses.
复制标题
用掩盖的刺激调节会影响皮肤电导反应的时间。
DOI：
10.1037/a0019927
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发表时间：
2010-08
影响因子：
1.9
通讯作者：
Helmstetter FJ
中科院分区：
文献类型：
--
作者：
Balderston NL;Helmstetter FJ
在巴甫洛夫恐惧条件反射中，厌恶性无条件刺激（UCS）与中性条件刺激（CS）反复配对。因此，受试者开始对CS表现出条件反应（CR），表明期望和恐惧。目前有两种普遍的模型竞争来解释主观意识在恐惧条件反射中的作用。单过程模型的支持者断言，一个单一的命题学习过程介导CR表达和UCS预期。双过程模型的支持者断言，这些行为反应是两个独立的学习过程的表达。我们使用后向掩蔽来阻止我们的视觉CS的感知，并测量这种训练对随后的未掩蔽性能的影响。在两个单独的实验中，我们显示了CR表达和UCS预期之间的解离后，差分延迟条件与掩蔽CS。在实验一中，我们表明，掩蔽训练有利于CR表达时，相同的CS在随后的未掩蔽的重新获取任务。在实验二中，我们表明，掩蔽训练延缓学习时，CS+的一部分，在随后的未掩蔽的封锁任务的化合物CS。我们的研究结果表明，多个记忆系统以平行、独立的方式编码情感记忆。
In Pavlovian fear conditioning, an aversive unconditional stimulus (UCS) is repeatedly paired with a neutral conditional stimulus (CS). As a consequence, the subject begins to show conditional responses (CRs) to the CS that indicate expectation and fear. There are currently two general models competing to explain the role of subjective awareness in fear conditioning. Proponents of the single-process model assert that a single propositional learning process mediates CR expression and UCS expectancy. Proponents of a dual-process model assert that these behavioral responses are expressions of two independent learning processes. We used backward masking to block perception of our visual CSs and measured the effect of this training on subsequent unmasked performance. In two separate experiments we show a dissociation between CR expression and UCS expectancy following differential delay conditioning with masked CSs. In Experiment I, we show that masked training facilitates CR expression when the same CSs are presented during a subsequent unmasked reacquisition task. In Experiment II we show that masked training retards learning when the CS+ is presented as part of a compound CS during a subsequent unmasked blocking task. Our results suggest that multiple memory systems operate in a parallel, independent manner to encode emotional memories.