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뇌과학이미징연구단
뇌과학 이미징 연구단
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Less is more: Semantic information survives interocular suppression when attention is diverted

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Title
Less is more: Semantic information survives interocular suppression when attention is diverted
Author(s)
Kangyong Eo; Oakyoon Cha; Sang Chul Chong; Min-Suk Kang
Publication Date
2016-05
Journal
JOURNAL OF NEUROSCIENCE, v.36, no.20, pp.5489 - 5497
Publisher
SOC NEUROSCIENCE
Abstract
The extent of unconscious semantic processing has been debated. It is well established that semantic information is registered in the absence of awareness induced by inattention. However, it has been debated whether semantic information of invisible stimuli is processed during interocular suppression, a procedure that renders one eye's view invisible by presenting a dissimilar stimulus to the other eye. Inspired by recent evidence demonstrating that reduced attention attenuates interocular suppression, we tested a counterintuitive hypothesis that attention withdrawn from the suppressed target location facilitates semantic processing in the absence of awareness induced by interocular suppression. We obtained an electrophysiological marker of semantic processing (N400 component) while human participants' spatial attention was being manipulated with a cueing paradigm during interocular suppression. We found that N400 modulation was absent when participants' attention was directed to the target location, but present when diverted elsewhere. In addition, the correlation analysis across participants indicated that the N400 amplitude was reduced with more attention being directed to the target location. Together, these results indicate that inattention attenuates interocular suppression and thereby makes semantic processing available unconsciously, reconciling conflicting evidence in the literature. We discuss a tight link among interocular suppression, attention, and conscious awareness. © 2016 the authors
URI
https://pr.ibs.re.kr/handle/8788114/2574
ISSN
0270-6474
Appears in Collections:
Center for Neuroscience Imaging Research (뇌과학 이미징 연구단) > Journal Papers (저널논문)
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