事象関連電位(ERP)を利用した人工現実感制御用ヒューマンインターフェース

概要

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We are developing a novel human-interface for the virtual reality system utilizing the Event-Related Potentials (ERP). This interface was designed to enable interface communication between a virtual reality system and a user, particularly a disable person, without any body movements. ERPs were recorded from healthy subjects during alphabet discrimination tasks. As the stimulus of the task, four kinds of letters, "A","B", "a", and "b" were used. One of these four letters was selected in a random order and was displayed on a CRT screen for 300 msec. The probability of the appearance of the uppercase letters "A" and "B" was set at 0.15 ; that of the lowercase letters "a" and "b" was set at 0.35. Subjects were ordered to count the prescribed target stimuli (the uppercase letters "A" or "B"). Two hundred stimuli (letters) were displayed in each session. The P300 components of averaged ERP waveforms were successfully obtained from the target trials. Results clearly showed that the P300 component can be used to detect the attention of subjects without requiring physical responses, and can be used as a human-interface to computer systems.
東海大学の論文
1994-03-30