人々の興味を引きつける案内ロボット-後ろ向きに移動する案内の効果  [in Japanese] How to Encourage People to Listen to a Guide Robot?  [in Japanese]

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Abstract

案内サービスは,人々とのインタラクションを通じて活動するロボットにとって共通かつ重要なサービスである.本稿では,ロボットが案内を行う際に,周囲に存在する人々の興味を引きつけ,自発的に案内へと参加させるための振舞いをデザインし,その効果を検証する.そのために我々は,ロボットの顔の向き方向や移動方向,案内時の人々とロボットの位置関係に注目し,Area of audience(AOA)と,Area of passing(AOP)という2つの領域を定義した.ロボットが前向きに移動を行う場合には,AOAとAOPの範囲が重なることで,AOAの範囲が減少し,周囲に存在する人々の興味を引きつけることが困難となる.これに対し,ロボットが後ろ向きに移動することで,AOAとAOPの重なる範囲が減少し,前向きに移動する場合と比較してAOAの範囲が大きくなることで,より多くの人々の興味を引きつけることが可能になる.これらの考察をもとに,我々はショッピングモール内での実証実験を行い,ロボットが前向きに移動して案内する場合と,後ろ向きに移動して案内する場合で,周囲の人々の興味を引きつけた割合の比較を行った.その結果,ロボットが後ろ向きに移動して案内することで,前向きに移動して案内する場合よりも,多くの人々の興味を引きつけたことが示された.Guiding people is one of the common tasks of social robots. In guiding tasks, we are particularly interested in encouraging people to overhear the robot's conversation with others, since it has often been observed that even people who hesitate to interact with a robot are willing to eavesdrop on the conversation. This paper describes a behavior model for a robot that encourages people to overhear its tour guidance. In the model, we distinguish two interaction spaces as defined by a robot's gaze direction and its movement direction: an area of audience (AOA) and an area of passing (AOP). When a robot moves forward, the AOA and AOP overlap, which reduces the size of the AOA; as a result, this would decrease the chances of people overhearing the robot's conversation. On the other hand, when a robot moves backward, the overlap of the AOA and AOP decreases, which results in a larger AOA, increasing the chance for people to overhear the conversation. Based on these ideas, we conducted a field experiment to compare the ratios of overhearing in "moving forward" and "moving backward" conditions. The experimental results revealed that in fact people more often overhear the robot's conversation in the "moving backward" condition. Moreover, we confirmed that people often overhear conversation in the AOA but rarely in the AOP.

Guiding people is one of the common tasks of social robots. In guiding tasks, we are particularly interested in encouraging people to overhear the robot's conversation with others, since it has often been observed that even people who hesitate to interact with a robot are willing to eavesdrop on the conversation. This paper describes a behavior model for a robot that encourages people to overhear its tour guidance. In the model, we distinguish two interaction spaces as defined by a robot's gaze direction and its movement direction: an area of audience (AOA) and an area of passing (AOP). When a robot moves forward, the AOA and AOP overlap, which reduces the size of the AOA; as a result, this would decrease the chances of people overhearing the robot's conversation. On the other hand, when a robot moves backward, the overlap of the AOA and AOP decreases, which results in a larger AOA, increasing the chance for people to overhear the conversation. Based on these ideas, we conducted a field experiment to compare the ratios of overhearing in "moving forward" and "moving backward" conditions. The experimental results revealed that in fact people more often overhear the robot's conversation in the "moving backward" condition. Moreover, we confirmed that people often overhear conversation in the AOA but rarely in the AOP.

Journal

  • 情報処理学会論文誌

    情報処理学会論文誌 51(2), 301-313, 2010-02-15

Codes

  • NII Article ID (NAID)
    110007970639
  • NII NACSIS-CAT ID (NCID)
    AN00116647
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    1882-7764
  • Data Source
    NII-ELS  IPSJ 
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