Contextual Cognitive Analysis for Japanese Sign Language by Brain-based Information and Communications Technologies

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N400 in semantic deviation word of JSL was increased in comparison with the meaningless operation, though the individual difference existed. Next, semantic analysis process during the signing and on the reading were examined. As the result, N400 increased in both of the signing and the reading in the semantic incongruity, and the button reaction time in the signing increased in comparison with the reading. Thus, the effect of the modality of the language was considered. In addition, on a hearing and a deaf, cerebrum activity of the processing of letter was estimated by Focus, and the difference between the semantic process was observed. The analysis procedure of semantic analysis mechanism of the deaf was examined, and some qualitative fact was confirmed.