Two is better than one: Apologies from two robots are preferred

• Yuka Okada ,

  Contributed equally to this work with: Yuka Okada, Mitsuhiko Kimoto, Takamasa Iio, Katsunori Shimohara, Masahiro Shiomi

  Roles Conceptualization, Data curation, Investigation, Methodology, Software, Writing – review & editing

  Affiliations Department of Agent Interaction Design Laboratory, Advanced Telecommunications Research Institute International, Kyoto, Japan, Department of Information Systems Design, Doshisha University, Kyoto, Japan

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• Mitsuhiko Kimoto ,

  Contributed equally to this work with: Yuka Okada, Mitsuhiko Kimoto, Takamasa Iio, Katsunori Shimohara, Masahiro Shiomi

  Roles Conceptualization, Formal analysis, Funding acquisition, Investigation, Methodology, Supervision, Validation, Writing – review & editing

  Affiliation Department of Agent Interaction Design Laboratory, Advanced Telecommunications Research Institute International, Kyoto, Japan

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• Takamasa Iio ,

  Contributed equally to this work with: Yuka Okada, Mitsuhiko Kimoto, Takamasa Iio, Katsunori Shimohara, Masahiro Shiomi

  Roles Conceptualization, Formal analysis, Funding acquisition, Methodology, Supervision, Validation, Writing – review & editing

  Affiliations Department of Agent Interaction Design Laboratory, Advanced Telecommunications Research Institute International, Kyoto, Japan, Faculty of Culture and Information Science, Doshisha University, Kyoto, Japan

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• Katsunori Shimohara ,

  Contributed equally to this work with: Yuka Okada, Mitsuhiko Kimoto, Takamasa Iio, Katsunori Shimohara, Masahiro Shiomi

  Roles Conceptualization, Project administration, Resources, Supervision, Writing – review & editing

  Affiliations Department of Agent Interaction Design Laboratory, Advanced Telecommunications Research Institute International, Kyoto, Japan, Department of Information Systems Design, Doshisha University, Kyoto, Japan

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• Masahiro Shiomi

  Contributed equally to this work with: Yuka Okada, Mitsuhiko Kimoto, Takamasa Iio, Katsunori Shimohara, Masahiro Shiomi

  Roles Conceptualization, Formal analysis, Funding acquisition, Methodology, Project administration, Resources, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing

  * E-mail: m-shiomi@atr.jp

  Affiliation Department of Agent Interaction Design Laboratory, Advanced Telecommunications Research Institute International, Kyoto, Japan

  https://orcid.org/0000-0003-4338-801X

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