About the Authors

Eiji Matsunaga

Eiji.Matsunaga@brain.riken.jp

Affiliation Laboratory for Symbolic Cognitive Development, RIKEN Brain Science Institute, Wako, Japan

Sanae Nambu

Affiliation Laboratory for Symbolic Cognitive Development, RIKEN Brain Science Institute, Wako, Japan

Mariko Oka

Affiliation Laboratory for Symbolic Cognitive Development, RIKEN Brain Science Institute, Wako, Japan

Kazuo Okanoya

Affiliations Department of Life Sciences, Graduate School of Arts and Sciences, University of Tokyo, Tokyo, Japan, ERATO Okanoya Emotional Information Project, JST-ERATO, Saitama, Japan, Emotional Information Joint Research Laboratory, RIKEN Brain Science Institute, Wako, Japan

Atsushi Iriki

Affiliation Laboratory for Symbolic Cognitive Development, RIKEN Brain Science Institute, Wako, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: EM. Performed the experiments: EM SN MO. Analyzed the data: EM. Contributed reagents/materials/analysis tools: KO. Wrote the paper: EM AI.