To Tell the Truth: Virtual Agents and Morning Morality

  • Sharon MozgaiEmail author
  • Gale Lucas
  • Jonathan Gratch
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 10498)


This paper investigates the impact of time of day on truthfulness in human-agent interactions. Time of day has been found to have important implications for moral behavior in human-human interaction. Namely, the morning morality effect shows that people are more likely to act ethically (i.e., tell fewer lies) in the morning than in the afternoon. Based on previous work on disclosure and virtual agents, we propose that this effect will not bear out in human-agent interactions. Preliminary evaluation shows that individuals who lie when engaged in multi-issue bargaining tasks with the Conflict Resolution Agent, a semi-automated virtual human, tell more lies to human negotiation partners than virtual agent negotiation partners in the afternoon and are more likely to tell more lies in the afternoon than in the morning when they believe they are negotiating with a human. Time of day does not have a significant effect on the amount of lies told to the virtual agent during the multi-issue bargaining task.


Morning morality Virtual humans Honest responding Multi-issue bargaining 


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© Springer International Publishing AG 2017

Authors and Affiliations

  1. 1.Institute for Creative TechnologiesUniversity of Southern CaliforniaLos AngelesUSA

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