Measuring sentence processing by electroencephalography (EEG): New technique using M-sequence modulation

Hiroshige Takeichi, Sachiko Koyama, Andrzej Cichocki

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Studies using event-re lated brain potentials (ERPs) have reported electrophysiological responses to semantically and/or grammatically anomalous words embedded in a sentence for decades. Here we have successfully developed a technique with which we can objectively estimate the level of listeners' speech comprehension using continuous speech sounds without linguistic anomalies. We used minute-long speech sounds whose amplitudes were modulated by an m-sequence (pseudorandom binary sequence), Eelectroencephalograms (EEGs) were recorded from Japanese speakers and were cross-correlated with the m-sequence. We identified a signal peak which was found only for comprehensible but not for incomprehensible (backward-played Japanese and Spanish) speech stimuli in an independent component cross-correlation function. The correlation time of the signal peak was 400 ms and the peak location on the scalp was Cz-Pz. The present study has thus shown that a minute-long EEG signal is sufficient for the assessment of speech comprehension.

Original languageEnglish
Title of host publication2007 IEEE/ICME International Conference on Complex Medical Engineering, CME 2007
Pages1531-1534
Number of pages4
DOIs
Publication statusPublished - 2007
Externally publishedYes
Event2007 IEEE/ICME International Conference on Complex Medical Engineering, CME 2007 - Beijing, China
Duration: 23 May 200727 May 2007

Publication series

Name2007 IEEE/ICME International Conference on Complex Medical Engineering, CME 2007

Conference

Conference2007 IEEE/ICME International Conference on Complex Medical Engineering, CME 2007
Country/TerritoryChina
CityBeijing
Period23/05/0727/05/07

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