Fundamental study of the pictogram-scanning-BCI

Abstract

We developed a pictogram-scanning-BCI system for neurogenic patients and people with severe physical disabilities. Pictograms are applied as a means for communication. Because pictograms have meanings in pictures, the pictogram method may communicate faster than the traditional letter method. We developed a Brain Computer Interface (BCI) with nine pictograms for at-home care. We conducted comparative experiments of the pictogram-scanning method and traditional letter-scanning method to review input accuracy, input speed and bit rate. The BCI system showed nine pictograms on a 3x3 matrix to subjects, as well as 36 letters on a 6x6 matrix. A row or column of pictograms or letters was randomly flashed. As a result, the pictogram method was effective for particular communication such as the case of at-home care. © 2011 Springer-Verlag.