Needling Through the Threads: A Visualization Tool for Navigating Threaded Online Discussions

Paper Title

Needling Through the Threads: A Visualization Tool for Navigating Threaded Online Discussions

Publication Info

• Topic area: Visualization tools for content moderation in threaded online discussions.
• Keywords: Content moderation, threaded discussions, visualization, Reddit, toxicity detection, human-in-the-loop, temporal analysis, interactive tools, community norms, sociotechnical systems.

Background and Problem

• Problem / challenge: Threaded online discussions, such as those on Reddit, are difficult to navigate due to their volume, rapid pace, and deep nesting, which obscures conversation flow and complicates moderation. Existing tools lack multi-level contextual understanding and fail to address community-specific norms.
• Significance: Effective moderation is critical to maintaining community health and safety, reducing exposure to harmful content, and preventing moderator burnout. Tools that enhance moderation efficiency and accuracy are essential for scaling efforts in large online communities.
• Motivation and related work: Prior research has developed computational tools and visualization systems for linear or topic-based discussions but has not adequately addressed the complexities of threaded discussions. Existing moderation tools like Reddit’s ModQueue lack contextual awareness and rely heavily on manual review or basic keyword-based filters, which are insufficient for nuanced, community-specific moderation.

Solution

• Proposed approach: Needle, an interactive visualization tool, provides multi-level visual analytics to help moderators navigate threaded discussions. It summarizes key metrics such as activity, toxicity, and voting trends, enabling efficient monitoring and intervention.
• Novelty:
  1. Combines feed-level and thread-level visualizations to support multi-level summarization of threaded discussions.
  2. Integrates toxicity detection and visual cues to direct moderator attention to problematic content.
  3. Offers customizable settings to adapt to diverse community norms and discussion sizes.
• Procedure and key techniques:
  • Data collection from Reddit API and toxicity scoring using the Perspective API.
  • Feed-level interface: Displays subreddit-wide activity and toxicity trends using histograms, bar charts, and temporal visualizations.
  • Thread-level interface: Provides detailed views of individual threads, highlighting toxic comments and enabling direct moderation actions.
  • Customizable thresholds and sorting options allow moderators to tailor the tool to their community’s needs.

Results

• Concrete findings:
  • Moderators adjusted toxicity thresholds an average of 270.8 times per session, compared to 35.6 for score thresholds.
  • Visual highlighting and filtering were rated highly useful by 8 out of 10 moderators.
  • Thread-level visualizations were effective for identifying anomalies, though TLC-specific visualizations were less impactful due to low reply volumes.
• Advantage over baselines:
  • Compared to Reddit’s ModQueue, Needle provides contextual visualizations, enabling proactive moderation and reducing cognitive load.
  • Toxicity metrics and visual cues helped moderators identify unreported problematic content more effectively than existing tools.
• Experiments / evaluation:
  • User study with 10 Reddit moderators from diverse subreddits (mean community size: 1.84M members, mean experience: 6.5 years).
  • Tasks included locating threads of interest and moderating comments using Needle.
  • Semi-structured interviews and thematic analysis validated the tool’s usability and effectiveness.
• Limitations and future work:
  • Simulated environment with pre-scraped data may not capture real-time moderation dynamics.
  • Limited integration with existing tools like AutoMod and ModQueue.
  • Generalized toxicity detection models struggled with community-specific norms; future work should develop context-sensitive models.

Summary

Needle is a visualization tool designed to assist Reddit moderators in navigating and moderating threaded discussions. By providing multi-level visual summaries, toxicity metrics, and customizable settings, it enables efficient and proactive moderation while reducing cognitive load. A user study with 10 moderators demonstrated its effectiveness in identifying problematic content and integrating into existing workflows. However, challenges remain in adapting toxicity detection to community-specific norms and integrating Needle with existing moderation tools. Future work will focus on developing community-specific models, incorporating user-level signals, and expanding the tool’s capabilities for both moderators and general users.