[1] Kanazawa Univ, Dept Clin Res Social Recognit & Memory, Res Ctr Child Mental Dev, Kanazawa, Ishikawa, Japan
[2] Vanderbilt Kennedy Ctr, Dept Pediat, Nashville, TN USA
[3] Vanderbilt Kennedy Ctr, Dept Psychiat, Nashville, TN USA
[4] Vanderbilt Kennedy Ctr, Dept Special Educ, Nashville, TN USA
[5] Keio Univ, Sch Med, Dept Neuropsychiat, Tokyo, Japan
[6] Osaka Univ, Dept Syst Innovat, Grad Sch Engn Sci, Osaka, Japan
[7] JST ERATO ISHIGURO Symbiot Human Robot Interact, Osaka, Japan
[8] Natl Inst Adv Ind Sci & Technol, Serv Robot Res Grp, Intelligent Syst Inst, Tsukuba, Japan
[9] Natl Ctr Child Hlth & Dev, Dept Psychosocial Med, Tokyo, Japan