课前用语音 AI 练习讨论，MBA 学生课堂发言量提升约 31%
How assigned AI use before class shapes active student engagement in class
759 名 MBA 学生的随机实验，课前跟语音 AI 练两次讨论，课堂发言多了 31%，做教育产品或教学的都该看看数据。
一项预注册田野实验覆盖 759 名 MBA 学生、10 个教学班。每名学生随机分配 10 次课中的 2 次，用专门构建的语音 AI 讨论伙伴做课前准备。使用两次后，学生在后续课堂上的自愿发言量增加约 31%。使用更多的学生报告发言更自在、感知学习更强，但专注度和动机没有提升。
How assigned AI use before class shapes active student engagement in class
AI learning tools are rapidly entering classrooms, but evidence about whether they help students learn is mixed and rests mostly on test scores. Comparatively less research addresses whether the use of AI changes students' live learning behaviors in class. Here, we report the results of a preregistered field experiment with 759 MBA students enrolled in ten sections of a course, in which each student was randomly assigned two of ten class sessions to prepare for with a purpose-built voice-based AI discussion partner. After two uses of the AI discussion partner, students made about 31% more voluntary contributions in each later class session. Students who used the AI discussion partner more also reported greater comfort speaking up and greater perceived learning, but not greater focus or motivation. These findings suggest that repeated practice with a voice-based AI partner can meaningfully increase students' engagement in class discussion, enhancing a critical intermediate learning outcome.
