In face-to-face communication, we can confidently communicate through our bodies. Recently, agents have widely surfaced as existences that interact with humans, and several studies have investigated the formation of social relations with such agents. This research focuses on 'sharing an environment' when humans communicate with humans, and we adapt it to human and agent interactions. We examined the effects of sharing an environment in two cooperative task experiments in real/virtual worlds and found that reception frequency for information from the agent with a body in the real world is significantly higher than the reception frequency for information with the agent with a body in the virtual world. In conclusion, our results suggest that sharing the same environment through a body affected the reliability of the information.
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