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. 2020 Aug 28;14:60. doi: 10.3389/fnbot.2020.00060

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Copyright © 2020 Zeng, Zhao, Zhang, Zhao, Zhao and Lu.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Visual inputs of participant robot in the test stage. (a) The blue robot in the left is the actor, and the red robot in right is the participant who should infer the actor's belief. The middle screen in the (a), and the remaining figures are the visual inputs of the participant robot. (b) An object (ladybird) is put on the left black rectangle. (c) The ladybird is hidden in the yellow box. (d) The blindfold is interposed between the actor (the blue robot) and the object (ladybird), and the object is moved to the right side. (e) The ladybird is hidden in the green box. (f) Finally, the blindfold is removed.