| Summary: | 碩士 === 國立臺中科技大學 === 多媒體設計系碩士班 === 107 === With the maturity of artificial intelligence technology, intelligent voice assistants (VAs), such as Amazon Echo and Google Home, have already become indispensable partners in our daily lives. However, how to design VA not only to assist people with basic tasks, reduce loneliness but also maintain social connections, is still unclear? AI experts have suggested that giving intelligent virtual assistants a personality could increase users'' trust in them. Therefore, this study aimed to investigate the relevance between the personality of VA and users'' trust. The study consisted of two parts, the pilot study and the experiment. The pilot study is to investigate the relationship between the voice variables and the perceived personality of VAs. We used the text-to-speech service to configure the speaking rate, pitch, volume; and created eight VA voice samples. Participants were recruited via an online questionnaire to rate each voice sample on the Big-Five personality scales. A total of 122 complete responses were received. The experiment aims to explore whether the personality of a VA affects its trustworthiness and participants'' behavior. In the experiment, the VA was used as a virtual secretary for a laboratory in a university. Two voice samples, the perceived introvert voice and the perceived extrovert voice, were created and used as the personality cue of VA based on the finding of the pilot study. A total of 60 participants were recruited and distributed to one of the two experimental conditions, an introvert VA and an extrovert VA. Each participant individually entered the laboratory to interact with one of the VA and to complete the experimental task. Throughout the whole process, the Wizard of Oz method was adopted. One researcher remotely controlled the VA and recorded the participant''s behavior behind the one-way mirror. Afterward, participants were requested to fill in a Likert scale questionnaire regarding their trust in the VA basing on the experience. The participants'' self-report inventories and their degree of completion of the experimental task were analyzed. The study found that the VA''s personality correlated with participants'' trust and behaviors; the participants were more willing to trust the extroverted VA and follow their instructions. Finally, implications for VA personality design and suggestions for future work in this area are also provided based on this study.
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