Are bigger robots scary? - The relationship between robot size and psychological threat

Yutaka Hiroi, Akinori Ito

Research output: Chapter in Book/Report/Conference proceedingConference contribution

11 Citations (Scopus)

Abstract

Human symbiosis service robots of various sizes have already been developed. However, few quantitative investigations have been made concerning the influence of the size of a robot on a user's impression. We focused on the height of a robot (robot size), investigating the effect of robot size on the anxiety or threat felt by a human to be caused by a robot and the appropriate human-robot distance. We prepared three mobile robots that were 0.6 m, 1.2 m and 1.8 m tall. One of these robots approached a male subject from a distance of 3 m, at a maximum speed of 0.4 m/s, and the subject stopped the robot using a switch when he began to feel anxious. We measured the distance between the human and the robot when the subject stopped the robot. Then, we asked the subject to complete a questionnaire to evaluate differences in anxiety levels caused by robots of different sizes. As a result of the experiment based on 19 subjects, we were able to observe a tendency for the human-robot distance to increase along with the size of the robot. From the questionnaires, we found that the subjects felt most anxious with the 1.8-m-tall robots, but that some subjects also experienced anxiety with the 0.6-m-tall robots. Considering both the experimental results and the questionnaires, we conclude that 1.2 m is better than other two sizes.

Original languageEnglish
Title of host publicationProceedings of the 2008 IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM 2008
Pages546-551
Number of pages6
DOIs
Publication statusPublished - 2008 Sep 30
Event2008 IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM 2008 - Xi'an, China
Duration: 2008 Aug 22008 Aug 5

Publication series

NameIEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM

Other

Other2008 IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM 2008
Country/TerritoryChina
CityXi'an
Period08/8/208/8/5

Keywords

  • Psychological threat
  • Robot
  • Service robot
  • Size
  • Subjective acceptable distance

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Software
  • Computer Science Applications
  • Electrical and Electronic Engineering

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