为课堂小组讨论设计移动端分析工具，助教师实时发现并干预问题小组。
Walking through Discussions: A Mobile Visual Analytics System for In-Situ Group Discussion Analysis
- 基于音频流实时提取互动模式与话题进展，支持小屏触控操作。
- 通过六视图协同设计，实现跨组对比与异常定位，准确识别低参与组。
- 适合一线教师在教室走动时使用，提升现场教学干预效率。
小组讨论式教学广泛用于促进协作学习，但教师在实体课堂中常难以同时监控多个小组，并在干预前快速诊断目标小组。现有可视化分析工具多支持桌面端事后分析，对现场走动式教学支持有限。为此，我们提出MobileGroupVis——一种面向课堂小组讨论的移动端可视化分析系统。该系统整合多组监控、单组诊断与教学干预，形成适配小屏触控交互的简洁分析流程。其核心为轻量级流式分析管道，将小组音频转化为结构化讨论数据，并通过对话分析模块提取互动模式、话题演进与偏离情况。为实现概览与追溯兼顾，设计六种协同视图：紧凑图标可视化词数、互动强度与话题偏离，便于跨组比较与异常定位；另配有观点演化、互动动态、话题覆盖与对话记录等详细视图。通过两个案例研究与专家访谈评估，结果初步表明MobileGroupVis能帮助教师理解讨论过程、识别需关注小组，并支持课堂内即时干预。
原文摘要 · Abstract (English)
Group discussion-based teaching is widely used to foster collaborative learning, yet teachers in physical classrooms often struggle to simultaneously monitor multiple groups and quickly diagnose a target group before intervening. Existing visual analytics tools primarily support post-hoc analysis on desktop, providing limited support for in-situ walk-around teaching. To address this gap, we present MobileGroupVis, a mobile visual analytics system for in-situ analysis of classroom group discussions. MobileGroupVis integrates multi-group monitoring, single-group diagnosis, and instructional intervention into a concise analytical workflow tailored for small-screen touch interaction. The system is powered by a lightweight streaming analysis pipeline that converts group audio into structured discussion data and further extracts interaction patterns, topic progression, and topic deviation through a dialogue analysis module. To enable both glanceable overview and traceable diagnosis, we design six coordinated views, including a compact glyph that visually encodes word count, interaction intensity, and topic deviation for efficient cross-group comparison and anomaly localization, along with detailed views for opinion evolution, interaction dynamics, topic coverage, and dialogue records. We evaluate MobileGroupVis through two case studies and expert interviews. The results provide preliminary evidence that MobileGroupVis supports teachers in understanding discussion processes, identifying groups in need of attention, and facilitating in-class intervention.
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