An Interpretable Closed-Loop Intelligent Tutoring System for Multimodal Affective Feedback in Asynchronous Presentation Training

In three linesClosed-loop intelligent tutoring system using XGBoost to assess oral presentation skills via multimodal analysis (facial, vocal, textual, oculomotor). Trained on 10,360 MOOC videos, generates feedback aligned to 7-dimensional BARS scale. Study with 204 learners over 30 days: significant improvements (Cohen's d = 0.39-0.90), strong correlation between practice frequency and performance.

Summary generated by Claude — human-verified