Decoding chromaticity and luminance from patterns of EEG activity

文化大學機構典藏 CCUR > 新聞暨傳播學院 > 資訊傳播學系暨資訊傳播研究所 > 期刊論文 > Item 987654321/49479

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题名:	Decoding chromaticity and luminance from patterns of EEG activity
作者:	Sutterer, DW (Sutterer, David W.) Coia, AJ (Coia, Andrew J.) Sun, V (Sun, Vincent) Shevell, SK (Shevell, Steven K.) Awh, E (Awh, Edward)
贡献者:	資傳系
关键词:	chromaticity color vision multivariate pattern analysis visual evoked potential
日期:	2021-04
上传时间:	2021-04-14 15:51:37 (UTC+8)
摘要:	A long-standing question in the field of vision research is whether scalp-recorded EEG activity contains sufficient information to identify stimulus chromaticity. Recent multivariate work suggests that it is possible to decode which chromaticity an observer is viewing from the multielectrode pattern of EEG activity. There is debate, however, about whether the claimed effects of stimulus chromaticity on visual evoked potentials (VEPs) are instead caused by unequal stimulus luminances, which are achromatic differences. Here, we tested whether stimulus chromaticity could be decoded when potential confounds with luminance were minimized by (1) equating chromatic stimuli in luminance using heterochromatic flicker photometry for each observer and (2) independently varying the chromaticity and luminance of target stimuli, enabling us to test whether the pattern for a given chromaticity generalized across wide variations in luminance. We also tested whether luminance variations can be decoded from the topography of voltage across the scalp. In Experiment 1, we presented two chromaticities (appearing red and green) at three luminance levels during separate trials. In Experiment 2, we presented four chromaticities (appearing red, orange, yellow, and green) at two luminance levels. Using a pattern classifier and the multielectrode pattern of EEG activity, we were able to accurately decode the chromaticity and luminance level of each stimulus. Furthermore, we were able to decode stimulus chromaticity when we trained the classifier on chromaticities presented at one luminance level and tested at a different luminance level. Thus, EEG topography contains robust information regarding stimulus chromaticity, despite large variations in stimulus luminance.
關聯:	PSYCHOPHYSIOLOGY 卷冊: 58 期: 4 文獻號碼: e13779
显示于类别:	[資訊傳播學系暨資訊傳播研究所] 期刊論文

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