Is auditory awareness graded or dichotomous: Electrophysiological correlates of consciousness at different depths of stimulus processing

IF 2.1 3区 心理学 Q2 PSYCHOLOGY, EXPERIMENTAL Consciousness and Cognition Pub Date : 2024-06-19 DOI:10.1016/j.concog.2024.103720
Dmitri Filimonov , Sampo Tanskanen , Antti Revonsuo , Mika Koivisto
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Abstract

The level-of-processing (LoP) hypothesis postulates that transition from unaware to aware visual stimuli is either graded or dichotomous depending on the depth of stimulus processing. Humans can be progressively aware of the low-level features, such as colors or shapes, while the high-level features, such as semantic category, enter consciousness in an all-or none fashion. Unlike in vision, sounds always unfold in time, which might require mechanisms dissimilar from visual processing. We tested the LoP hypothesis in hearing for the first time by presenting participants with words of different categories, spoken in different pitches near the perceptual threshold. We also assessed whether different electrophysiological correlates of consciousness, the auditory awareness negativity (AAN) and late positivity (LP), were associated with LoP. Our findings indicate that LoP also applies to the auditory modality. AAN is an early correlate of awareness independent of LoP, while LP was modulated by awareness, performance accuracy and the level of processing.

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听觉意识是分级还是二分:刺激处理不同深度的意识电生理相关性
处理水平(LoP)假说假定,根据刺激处理的深度,从不觉知到觉知的视觉刺激过渡是分级或二分的。人类可以逐步意识到颜色或形状等低级特征,而语义类别等高级特征则以全知或全不知的方式进入意识。与视觉不同,声音总是在时间中展开,这可能需要与视觉处理不同的机制。我们首次在听觉中测试了LoP假说,我们向参与者展示了不同类别的单词,这些单词是以接近知觉阈值的不同音调发出的。我们还评估了意识的不同电生理相关性--听觉意识负性(AAN)和晚期正性(LP)--是否与 LoP 相关。我们的研究结果表明,LoP 也适用于听觉模式。AAN 是意识的早期相关性,与 LoP 无关,而 LP 则受意识、表现准确性和处理水平的调节。
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来源期刊
Consciousness and Cognition
Consciousness and Cognition PSYCHOLOGY, EXPERIMENTAL-
CiteScore
4.30
自引率
8.30%
发文量
123
期刊介绍: Consciousness and Cognition: An International Journal provides a forum for a natural-science approach to the issues of consciousness, voluntary control, and self. The journal features empirical research (in the form of regular articles and short reports) and theoretical articles. Integrative theoretical and critical literature reviews, and tutorial reviews are also published. The journal aims to be both scientifically rigorous and open to novel contributions.
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