Measuring Sentence Processing by Electroencephalography (EEG): New Technique Using M-Sequence Modulation
Studies using event-related 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.
Hiroshige Takeichi Sachiko Koyama Andrzej Cichocki
Nishina Center for Accelerator-Based Science, RIKEN, Wako Saitama 351-0198 Japan;Brain Science Insti Brain Science Institute, RIKEN, Wako Saitama 351-0198 Japan;Research Institute for Electronic Scienc Brain Science Institute, RIKEN, Wako Saitama 351-0198 Japan;RISTEX, JST, Japan
国际会议
北京
英文
1559-1562
2007-05-23（万方平台首次上网日期，不代表论文的发表时间）