公開演說焦慮是常見且普遍的心理障礙，即便在線上的環境中仍然存在。自全球嚴重特殊傳染性肺炎爆發以來，越來越多的活動都逐漸轉以線上方式進行，同時受到正在發展的虛擬實境技術影響，來自VR的活動有越來越多的趨勢，且在諸多發展及應用當中其中一種應用便是可以治療公開演說焦慮。但在相關研究中卻鮮少關注VR線上活動中的虛擬替身如何影響使用者決策，及其容貌能對於後續行為可能產生的預測力及解釋力。據此，本研究以VR會議平台為研究工具，採取便利抽樣共招募了37名受測者以呈現不同容貌的虛擬替身進入VR會議平台環境進行公開演說。並參照資訊系統接受後持續使用模式之路徑，撤除中介影響路徑後以「虛擬替身容貌」為自變項，進一步探討「感知有用性」、「公開演說焦慮程度」、「滿意度」及「持續使用的意願」彼此之間的預測力及解釋力，及其在使用這項技術時可能的行為路徑。研究結果以多元迴歸路徑分析發現，「虛擬替身容貌」對「感知有用性」無顯著影響，但對「公開演說焦慮程度」有顯著影響；「感知有用性」及「公開演說焦慮程度」兩者皆對「滿意度」有顯著影響；「滿意度」對「持續使用的意願」有顯著影響。盼本研究結果所提供的綿薄之貢獻，有機會作為正在打造虛擬環境、虛擬替身及正在發展虛擬實境企業的參考依據，藉由了解使用者需求及行為以打造更好的服務及體驗。

It is common to see people anxious when they deliver speeches in public. Even online, people still have public speaking anxiety. Many activities have been switched online since COVID-19 broke out. And in recent years there is a growing trend of activities from virtual reality. Virtual reality has many applications. One of these applications can treat people from public speaking anxiety. However, in related studies little research have examined how avatars appearance in virtual reality activities how it affects decision making, and how much prediction and explanation from virtual avatars appearance can provide. Based on the description above, this research was done on a virtual reality conferencing software, there were 37 people recruited to give public speeches in virtual reality, and presented in different virtual avatars appearance. This research reference Post-Acceptance Model of Information System Continuance. And removal of mediating effect, used “virtual avatars appearance” as the Independent Variable, explored the relations beween “perceived usefulness”, “public speaking anxiety”, “satisfaction” and “continued Intention”. The probable behavior of the users using this technique also can be seen in the research. The results told that “virtual avatars appearance” has no significant effect on the “perceived usefulness”, but on the “public speaking anxiety”. Both “perceived usefulness” and “public speaking anxiety” have a significant effect on the “satisfaction degree”. “Satisfaction degree” has a significant effect on the “continued Intention”. I hope that the results will serve as a reference for companies that are developing virtual reality, and understanding people's needs, can create a better service and experience.

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