About the Authors

Wataru Teramoto

teraw@ais.riec.tohoku.ac.jp

Current address: Department of Computer Science and Systems Engineering, Muroran Institute of Technology, Muroran, Japan

Affiliations Research Institute of Electrical Communication, Tohoku University, Sendai, Japan, Department of Psychology, Graduate School of Arts and Letters, Tohoku University, Sendai, Japan

Shuichi Sakamoto

Affiliation Research Institute of Electrical Communication, Tohoku University, Sendai, Japan

Fumimasa Furune

Affiliation Research Institute of Electrical Communication, Tohoku University, Sendai, Japan

Jiro Gyoba

Affiliation Department of Psychology, Graduate School of Arts and Letters, Tohoku University, Sendai, Japan

Yôiti Suzuki

Affiliation Research Institute of Electrical Communication, Tohoku University, Sendai, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: WT SS FF JG YS. Performed the experiments: WT SS FF. Analyzed the data: WT FF. Contributed reagents/materials/analysis tools: SS JG YS. Wrote the paper: WT SS FF JG YS.