1. Research Institute of Electrical Communication, Tohoku University, Sendai, Japanikuriki@riec.tohoku.ac.jpwww.vision.riec.tohoku.ac.jp/ikuriki
2. College of Optometry, Ohio State University, Columbus, OH, USA
3. Department of Information Processing, Tokyo Institute of Technology Graduate School, Yokohama, Japan
4. Department of Information Design, Kogakuin University, Tokyo, Japan
5. Ritsumeikan Global Innovation Research Organization, Ritsumeikan University, Kyoto, Japan
6. Department of Psychology, Ohio State University, Mansfield, OH, USACollege of Optometry, Ohio State University, Columbus, OH, USA
7. Research Institute of Electrical Communication, Tohoku University, Sendai, Japan