期刊
CEREBRAL CORTEX
卷 25, 期 7, 页码 1697-1706出版社
OXFORD UNIV PRESS INC
DOI: 10.1093/cercor/bht355
关键词
attention; BCI; cocktail party; EEG; speech; stimulus-reconstruction
资金
- Science Foundation Ireland [09-RFP-NES2382]
- United States National Science Foundation [BCS0642584]
- CELEST
- National Science Foundation Science of Learning Center [NSF SBE-0354378]
- Irish Research Council for Science, Engineering Technology
- Direct For Computer & Info Scie & Enginr
- Div Of Information & Intelligent Systems [1332234] Funding Source: National Science Foundation
- Direct For Social, Behav & Economic Scie
- SBE Off Of Multidisciplinary Activities [1540916, 1248056] Funding Source: National Science Foundation
- Science Foundation Ireland (SFI) [09/RFP/NES2382] Funding Source: Science Foundation Ireland (SFI)
How humans solve the cocktail party problem remains unknown. However, progress has been made recently thanks to the realization that cortical activity tracks the amplitude envelope of speech. This has led to the development of regression methods for studying the neurophysiology of continuous speech. One such method, known as stimulus-reconstruction, has been successfully utilized with cortical surface recordings and magnetoencephalography (MEG). However, the former is invasive and gives a relatively restricted view of processing along the auditory hierarchy, whereas the latter is expensive and rare. Thus it would be extremely useful for research in many populations if stimulus-reconstruction was effective using electroen-cephalography (EEG), a widely available and inexpensive technology. Here we show that single-trial (approximate to 60 s) unaveraged EEG data can be decoded to determine attentional selection in a naturalistic multi-speaker environment. Furthermore, we show a significant correlation between our EEG-based measure of attention and performance on a high-level attention task. In addition, by attempting to decode attention at individual latencies, we identify neural processing at similar to 200 ms as being critical for solving the cocktail party problem. These findings open up new avenues for studying the ongoing dynamics of cognition using EEG and for developing effective and natural brain-computer interfaces.
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