三维虚拟学习环境中操作指导型虚拟教师设计与实现

三维虚拟学习环境以其良好的沉浸性逐渐被认可。相对于基于网页的学习环境，三维虚拟学习环境因操作复杂而对学习者有更大的认知负荷。该文提出引入指导学习者操作的虚拟教师来帮助学习者熟悉三维虚拟学习环境。研究中，在调查的基础上分析了导致学习者难以适应三维环境的原因，结合真实环境中教师的行为、语言、形象等方面的特点，设计并实现了可以伴随学习者的操作指导虚拟教师，通过控制组实验，验证了虚拟教师的有效性。

With the development of virtual reality technology and the optimization of network environment， three-dimensional virtual world which has the features of immersive is widely used in the field of education. But for learners， because of the lack of guidance and the Information Trek， three-dimensional virtual learning environment has a greater cognitive load than web-based learning environment. As one of the applications of artificial intelligence， virtual teacher has the features of lively， interactive， affinity and so on， which can provide effective teaching service and help learners to adapt to the three-dimensional virtual environment quickly and effectively. This study investigate and analyze the reason why learners have difficulties to adapt to the three-dimensional virtual environment， and proposes that virtual teacher which has so many advantages can help learners to adapt to the three-dimensional virtual environment quickly and effectively. At last， this study tests the validity of virtual teacher by experiment.