Indices for Objective Rating of Cognition, using NIRS

Abstract

In this study, we investigated how a reaction of the brain changed according to the understanding, using four different languages. We made 3 subjects listen a sound of short scene in a movie, and we measured a reaction of the brain, using NIRS. Subjects were a Netherlander who has lived in Japan for 10 months, a Salvadoran who has lived in Japan for 13 months, and a Chinese who has lived in Japan for 10 years. The languages of the sound were Dutch, Spanish, Chinese, and Japanese. Subjects listened the sound for 20 seconds, after 20 seconds rest, and they rested 20 seconds after listening. We asked the understanding about the sound at 10 stages after the experiment. As the result of the experiment, the clear difference in the reaction of the brain was admitted between the unknown language and the language which can be understood.