About the Authors

Keisuke Eto

Affiliation Department of Psychology, Keio University, Mita, Minato-ku, Tokyo, Japan

Shigeru Watanabe

Affiliation Department of Psychology, Keio University, Mita, Minato-ku, Tokyo, Japan

Hideaki Kawabata

kawabata@flet.keio.ac.jp

Affiliation Department of Psychology, Keio University, Mita, Minato-ku, Tokyo, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: KE SW HK. Performed the experiments: KE. Analyzed the data: KE. Wrote the paper: KE HK.