Dissociations among attention, perception and awareness during object-substitution masking
Dissociations among attention, perception and awareness during object-substitution masking
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DOI：
10.1046/j.0956-7976.2003.psci_1472.x
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发表时间：
2003-11-01
影响因子：
8.2
通讯作者：
Luck, SJ
中科院分区：
文献类型：
--
作者：
Woodman, GF;Luck, SJ
当一个视觉目标物体被四个与目标同时出现但在目标终止后仍然可见的点包围时，这四个点严重影响了目标识别性能。这种现象被称为对象替代掩蔽，它反映了一个假设，即目标和四个点都被识别了，但在目标被报告之前，四个点的表示取代了目标对象的表示。本研究使用事件相关电位技术来证明，以这种方式掩盖的目标被视觉系统识别并引发注意力的转移。然而，当注意力转移到目标时，只有面具仍然可见，导致行为检测性能受损。这些发现支持了客体替代假说，并为感知、注意和意识可以分离提供了新的证据。
When a visual target object is surrounded by four dots that onset at the same time as the target but remain visible after the target terminates, the four dots dramatically impair target discrimination performance. This phenomenon is called object-substitution masking, reflecting the hypothesis that both the target and the four dots are identified, but the representation of the four dots replaces the representation of the target object before the target can be reported. The present study used the event-related potential technique to demonstrate that a target masked in this manner is identified by the visual system and triggers a shift of attention. However, by the time attention is shifted to the target, only the mask remains visible, leading to impaired behavioral detection performance. These findings support the object-substitution hypothesis and provide new evidence that perception, attention, and awareness can be dissociated.