Relative blindsight arises from a criterion confound in metacontrast masking: Implications for theories of consciousness
Relative blindsight arises from a criterion confound in metacontrast masking: Implications for theories of consciousness
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DOI：
10.1016/j.concog.2011.10.003
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发表时间：
2012-03-01
影响因子：
2.4
通讯作者：
Di Lollo, Vincent
中科院分区：
文献类型：
--
作者：
Jannati, Ali;Di Lollo, Vincent
相对盲目是指在客观表现相同的情况下获得不同程度的主观意识时发生的。使用元对比掩蔽，Lau和Passingham(2006)报告了正常观察者在目标和掩蔽之间的两个刺激-开始不同步(SOA)中较短的一个的相对盲视。实验1复制了客观表现相等时主观意识的临界不对称性。我们认为，这种不对称性不能被认为是相对盲目的证据，因为观察者的反应是基于两个SOA的刺激(标准内容)的不同属性。在标准内容不变的情况下(实验2)，尽管客观表现是相同的，但两个SOA在主观意识上没有不对称。实验3考察了标准水平对相对盲视估计的影响。总体而言，目前的结果质疑元对比掩蔽是否是建立相对盲视的合适范式。讨论了意识理论的含义。(C)2011 Elsevier Inc.保留所有权利。
Relative blindsight is said to occur when different levels of subjective awareness are obtained at equality of objective performance. Using metacontrast masking, Lau and Passingham (2006) reported relative blindsight in normal observers at the shorter of two stimulus-onset asynchronies (SOAs) between target and mask. Experiment 1 replicated the critical asymmetry in subjective awareness at equality of objective performance. We argue that this asymmetry cannot be regarded as evidence for relative blindsight because the observers' responses were based on different attributes of the stimuli (criterion contents) at the two SOAs. With an invariant criterion content (Experiment 2), there was no asymmetry in subjective awareness across the two SOAs even though objective performance was the same. Experiment 3 examined the effect of criterion level on estimates of relative blindsight. Collectively, the present results question whether metacontrast masking is a suitable paradigm for establishing relative blindsight. Implications for theories of consciousness are discussed. (C) 2011 Elsevier Inc. All rights reserved.