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This paper presents an experiment that evaluates and compares the user enjoyment when playing a game of chess in two situations: against a physically embodied robotic agent and against a virtually embodied agent, displayed on screen. The results of the study suggest that embodiment has implications on user enjoyment, as the experience against a robotic agent was classified as more enjoyable than against a virtually embodied agent.
Pereira et al. (Mon,) studied this question.