Voice Assistants (VAs) are popular for simple tasks, but users are often hesitant to use them for complex activities like online shopping. We explored whether the vocal characteristics like the VA's vocal tone, can make VAs perceived as more attractive and trustworthy to users for complex tasks. Our findings show that the tone of the VA voice significantly impacts its perceived attractiveness and trustworthiness. Participants in our experiment were more likely to be attracted to VAs with positive or neutral tones and ultimately trusted the VAs they found more attractive. We conclude that VA's perceived trustworthiness can be enhanced through thoughtful voice design, incorporating a variety of vocal tones.

翻译：语音助手（VAs）在简单任务中广受欢迎，但用户常常不愿将其用于在线购物等复杂活动。本研究探讨了语音助手的音调等声音特征是否能使其在复杂任务中被用户感知为更具吸引力和可信度。我们的研究结果表明，语音助手的音调显著影响其感知吸引力和可信度。实验参与者更倾向于被具有积极或中性音调的语音助手所吸引，并最终更信任那些他们认为更具吸引力的语音助手。我们得出结论：通过精心设计语音，融入多样化的音调，可以有效提升语音助手的感知可信度。