About the Authors

Jinhyuk Kim

Affiliation Graduate School of Education, the University of Tokyo, Tokyo, Japan

Toru Nakamura

Affiliation Graduate School of Education, the University of Tokyo, Tokyo, Japan

Hiroe Kikuchi

Affiliation Department of Psychosomatic Research, National Institute of Mental Health, National Center of Neurology and Psychiatry, Tokyo, Japan

Tsukasa Sasaki

Affiliation Graduate School of Education, the University of Tokyo, Tokyo, Japan

Yoshiharu Yamamoto

yamamoto@p.u-tokyo.ac.jp

Affiliation Graduate School of Education, the University of Tokyo, Tokyo, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: YY JK HK TS. Performed the experiments: JK HK. Analyzed the data: JK TN HK. Contributed reagents/materials/analysis tools: YY JK HK TN. Wrote the manuscript: JK TN YY HK TS.