4.4 Article

Human-Robot Cooperation in Economic Games: People Show Strong Reciprocity but Conditional Prosociality Toward Robots

Journal

INTERNATIONAL JOURNAL OF SOCIAL ROBOTICS
Volume 15, Issue 5, Pages 791-805

Publisher

SPRINGER
DOI: 10.1007/s12369-023-00981-7

Keywords

Human-robot interaction; Human-robot cooperation; Prisoner's dilemma games; Rapoport's K-index; Reciprocity

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Understanding how people socially engage with robots in social settings is crucial. We conducted a study with 70 participants using prisoner's dilemma games, manipulating cooperative incentives to be high or low. While the incentive structure did not predict overall human cooperation, it did influence early round cooperation. Exploratory analyses revealed a tit-for-tat strategy against the robot and prosocial behavior when participants had high scores themselves. These findings contribute to the understanding of human-robot interactions in collaborative contexts.
Understanding how people socially engage with robots is becoming increasingly important as these machines are deployed in social settings. We investigated 70 participants' situational cooperation tendencies towards a robot using prisoner's dilemma games, manipulating the incentives for cooperative decisions to be high or low. We predicted that people would cooperate more often with the robot in high-incentive conditions. We also administered subjective measures to explore the relationships between people's cooperative decisions and their social value orientation, attitudes towards robots, and anthropomorphism tendencies. Our results showed incentive structure did not predict human cooperation overall, but did influence cooperation in early rounds, where participants cooperated significantly more in high-incentive conditions. Exploratory analyses further revealed that participants played a tit-for-tat strategy against the robot (whose decisions were random), and only behaved prosocially toward the robot when they had achieved high scores themselves. These findings highlight how people make social decisions when their individual profit is at odds with collective profit with a robot, and advance understanding on human-robot interactions in collaborative contexts.

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