Left a Comment, Not Just a Scroll: Brief Active Engagement on Social Media and Post-Session Mood

Abstract

Adults classified as habitual "active engagers" — leaving at least one specific, personalized comment or reply in more than 70% of their social media sessions, n=131 — reported better post-session mood (7.0/10 vs. 5.9/10, a 19% gap) and lower loneliness (4.1/10 vs. 5.3/10, a 23% gap, lower is better) over a three-week diary period than "passive scrollers" who commented in fewer than 20% of sessions (n=122). Total daily time spent on the platform did not differ meaningfully between groups (41 vs. 39 minutes/day), indicating the gap tracked how participants used their time on the platform rather than how much.

1. Introduction

Social media use is often discussed as a single behavior with a single effect on mood, but sessions can differ sharply in mode: some consist entirely of consuming a feed, others include leaving specific, personalized reactions to what a particular person posted. We compared adults whose sessions habitually included this kind of brief active engagement to adults whose sessions were habitually passive, holding total time on the platform roughly constant.

2. Method (Summary)

We recruited 288 adults who used a primary social platform daily and completed a three-week diary study, logging each session's duration and, via a lightweight in-app log with consent, whether they left at least one personalized comment or reply (as opposed to only viewing content or leaving a generic single-tap reaction). Participants were classified as "active engagers" if more than 70% of their sessions included a personalized comment or reply (n=131) or "passive scrollers" if fewer than 20% did (n=122); the remaining 35 participants fell in between and were excluded from the primary comparison. At the end of each session, participants logged a brief mood rating; loneliness was assessed with a standard short-form scale at the end of the three weeks.

3. Findings

Post-session mood averaged 7.0/10 for active engagers versus 5.9/10 for passive scrollers, a 19% gap. End-of-study loneliness scores were 4.1/10 for active engagers versus 5.3/10 for passive scrollers, a 23% gap in the favorable direction (lower loneliness). Average daily platform time was 41 minutes for active engagers versus 39 minutes for passive scrollers, a difference not distinguishable from chance, indicating the two groups spent comparable time on the platform but used it differently.

4. Discussion

Because total time on the platform did not differ between groups, the mood and loneliness gaps appear tied to what participants did with their sessions rather than how long the sessions were. Leaving a specific, personalized comment costs the commenter little time but gives the recipient something a passive view does not; the pattern is consistent with an account in which the small, reciprocal cost of active engagement is what produces its benefit, rather than exposure to the platform itself being the active ingredient.

5. Limitations and Future Directions

Group membership was based on participants' own diary logs rather than random assignment, so a disposition toward more social engagement generally could contribute to both engagement style and mood. The in-app log captured whether a comment was left but not its content or reception, so we cannot distinguish comments that were well received from those that were not. The three-week window is short relative to loneliness as a trait-like measure. A planned follow-up will code comment content and track recipient-reported response over a longer period.

Editorial Note

This report underwent CfAHC's Rapid Review Protocol, including AI-assisted literature cross-checking and a two-reviewer human sign-off.