A Method to Detect Lies in Free Communication Using Diverse Nonverbal Information: Towards an Attentive Agent

  • Authors:
  • Yoshimasa Ohmoto;Kazuhiro Ueda;Takehiko Ohno

  • Affiliations:
  • Graduate school of Infomatics, Kyoto University,;Graduate school of Arts and Sciences, University of Tokyo,;Technology Planning Department, NTT,

  • Venue:
  • AMT '09 Proceedings of the 5th International Conference on Active Media Technology
  • Year:
  • 2009

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Abstract

We usually speculate partner's mental states by diverse nonverbal information. Agents need the ability for natural communication with people. In this paper, we focused on a lie as one of the typical behavior in which we often express our mental states unconsciously. The purpose of this study is to experimentally investigate the possibility of automatic lie detection in communication. We proposed an experimental setting in which participants could spontaneously decide whether or not to tell a lie. We then conducted an experiment to record participants' behavior in this setting. After that, we investigated, by discriminant analysis, that we could achieve 68% accuracy in classifying the utterances into lies and the rest without taking account of individual features by using the noverbal behavior data. We would detect participants' stresses when they told a lie. The suggestions in this paper are useful to an agent which pays attention to user's mental states.