Discourse is the most direct communication means for learners and the explicit expression of the internal mental processes of learners. Therefore, it is the main data source for the study of interactive learning behavior. To deeply explore the patterns of learners' interactive discourse behavior in online course forum, we used content analysis method to analyze the posts in a course forum on the Cloud Classroom Platform in Central China Normal University to examine and categorize learners' posting behavior. We used probabilistic topic modeling and word frequency analysis to discover the popula...
