We manipulate the helpfulness and voice type of a voice-only agent teammate to examine subjective and objective outcomes in twenty teams with one agent and at least three humans during a problem solving task. Our results show that agent helpfulness, but not the humanness of the agent's voice, significantly alters perceptions of agent intelligence and trust in agent teammates, as well as affects team performance. Additionally, we find that the humanness of an agent's voice negatively interacts with agent helpfulness to flip its effect on perceived anthropomorphism and perceived animacy. This means human teammates interpret the agent's contributions differently depending on its vocal type. These findings suggest that function matters more than form when designing agents for effective human-agent teams and help to explain contradictory findings in the literature. Practitioners should be aware of the interactive effects of voice and helpfulness on subjective outcomes such as perceived anthropomorphism and animacy.

翻译：我们通过操控纯语音智能体队友的帮助性和语音类型，在包含一个智能体与至少三名人类成员组成的二十个团队中，针对问题解决任务的主客观结果进行探究。研究结果表明：智能体的帮助性（而非语音拟人度）会显著改变人类对智能体智能程度的感知、对智能体队友的信任度，并影响团队绩效。此外，我们发现智能体语音的拟人度与帮助性存在负向交互作用，会逆转其对感知拟人化和感知生命性的影响效果。这意味着人类队友会根据智能体语音类型的不同，对其贡献产生差异化解读。这些发现表明，在设计高效人机协作团队时，功能属性比形式要素更为重要，并有助于解释文献中的矛盾结论。实践者应关注语音特征与帮助性对感知拟人化、感知生命性等主观结果产生的交互效应。