Participant behavior and community response in online mental health communities: Insights from Reddit

Five-year analysis of 67 mental-health subreddits — 3.4 million posts and 24 million comments from ~2.4 million users. Mental-health communities show distinctive patterns in content length, throwaway-account usage, persistence, and community response, with support-seeking and venting the predominant intents; causal-inference analysis assesses how community responses shape users' subsequent behavior.