Second language (L2) pronunciation training has been a worldwide task. Although computer technology makes it possible to develop a talking head to teach pronunciation like a real language teacher, little is known about how a talking head may act on L2 learners’ emotional and cognitive learning process. We investigate L2 learners’ achievement emotions, cognitive load, and pronunciation learning performance in a computer-assisted pronunciation training (CAPT) system embedded with four conditions: audio only (AU), a human face (HF), a 3D talking head with front view (3Df), and a 3D talking head with both front and profile views (3D). Results showed that, with learning time went on, participants’ perceived anxiety, boredom, and pride increased while shame and hopelessness decreased and enjoyment kept stable. With 3D, participants’ anxiety increased the most and boredom increased the least. Moreover, 3D group also perceived the highest germane load and got the highest pronunciation learning performance. Furthermore, anxiety and shame correlated with learning performance positively while boredom correlated with it negatively; enjoyment and pride correlated positively with performance on Mandarin tones. These findings significantly contribute to the efforts to design or select virtual characters for computer-aided language learning (CALL) and also provide a valuable reference to study achievement emotions in HCI systems.

第二语言（L2）语音培训已成为一项全球性任务。尽管计算机技术使开发像真正的语言老师这样的会说话的人来教发音成为可能，但对于会说话的人如何对第二语言学习者的情感和认知学习过程产生作用的了解很少。我们在嵌入了四个条件的计算机辅助发音训练（CAPT）系统中调查了L2学习者的成就情感，认知负荷和发音学习性能：仅音频（AU），人脸（HF），3D正面讲话头视图（3Df），以及带有正视图和纵断面图（3D）的3D对话头。结果表明，随着学习时间的延长，参与者的焦虑感，无聊感和自尊心增强，而羞耻感和绝望感减少，娱乐保持稳定。使用3D 参与者的焦虑感增加最多，而无聊感增加最少。此外，3D小组还感觉到最高的德语负荷，并获得了最高的语音学习性能。此外，焦虑和羞耻与学习成绩呈正相关，而无聊与学习成绩呈负相关。享受和自豪感与普通话音调表现成正相关。这些发现极大地有助于设计或选择用于计算机辅助语言学习（CALL）的虚拟角色，并为研究HCI系统中的成就情感提供了宝贵的参考。焦虑和羞耻与学习成绩呈正相关，而无聊与学习成绩呈负相关。享受和自豪感与普通话音调表现成正相关。这些发现大大有助于设计或选择用于计算机辅助语言学习（CALL）的虚拟角色，并且为研究HCI系统中的成就情感提供了宝贵的参考。焦虑和羞耻与学习成绩呈正相关，而无聊与学习成绩呈负相关。享受和自豪感与普通话音调表现成正相关。这些发现极大地有助于设计或选择用于计算机辅助语言学习（CALL）的虚拟角色，也为研究HCI系统中的成就情感提供了宝贵的参考。