About the Authors

Jumpei Yamashita

Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Software, Validation, Visualization, Writing – original draft

junpei.yamashita.vd@hco.ntt.co.jp

Affiliations Access Operations Project, NTT Access Network Service Systems Laboratories, Nippon Telegraph and Telephone Corporation, Yokosuka, Kanagawa, Japan, Department of Intelligence Science and Technology, Graduate School of Informatics, Kyoto University, Kyoto, Kyoto, Japan

Hiroki Terashima

Roles Conceptualization, Formal analysis, Methodology, Supervision, Visualization, Writing – review & editing

Affiliation Human Information Science Laboratory, NTT Communication Science Laboratories, Nippon Telegraph and Telephone Corporation, Atsugi, Kanagawa, Japan

Makoto Yoneya

Roles Conceptualization, Funding acquisition, Investigation, Methodology, Resources, Supervision

Affiliation Human Information Science Laboratory, NTT Communication Science Laboratories, Nippon Telegraph and Telephone Corporation, Atsugi, Kanagawa, Japan

Kazushi Maruya

Roles Conceptualization, Formal analysis, Methodology, Project administration, Supervision, Visualization, Writing – review & editing

Affiliation Human Information Science Laboratory, NTT Communication Science Laboratories, Nippon Telegraph and Telephone Corporation, Atsugi, Kanagawa, Japan

Hidetaka Koya

Roles Conceptualization, Project administration

Affiliation Access Operations Project, NTT Access Network Service Systems Laboratories, Nippon Telegraph and Telephone Corporation, Yokosuka, Kanagawa, Japan

Haruo Oishi

Roles Conceptualization, Project administration

Affiliation Access Operations Project, NTT Access Network Service Systems Laboratories, Nippon Telegraph and Telephone Corporation, Yokosuka, Kanagawa, Japan

Hiroyuki Nakamura

Roles Conceptualization, Funding acquisition

Affiliation Access Operations Project, NTT Access Network Service Systems Laboratories, Nippon Telegraph and Telephone Corporation, Yokosuka, Kanagawa, Japan

Takatsune Kumada

Roles Supervision, Writing – review & editing

Affiliation Department of Intelligence Science and Technology, Graduate School of Informatics, Kyoto University, Kyoto, Kyoto, Japan

Competing Interests

The authors have read the journal’s policy and have the following competing interests: The authors, JY, HT, MY, KM, HK, HO, and HN, are paid employees of NTT. NTT has signed a joint research agreement with TK and provided a research grant. The authors would like to declare the following patents/patent applications associated with this research: PCT/JP2020/043246 and PCT/JP2021/008837. NTT has a pending patent (in Japan, and possibly in the United States, Europe, and China) for estimating task performance using the amplitude of pupillary fluctuations. This does not alter our adherence to PLOS ONE policies on sharing data and materials.