This cross-sectional study with longitudinal behavioral data examined whether depressive psychopathology is associated with greater reinforcement sensitivity to social media likes (i.e., more posting after receiving likes) across 3 datasets totaling 7,736 Twitter users and over 17 million posts, analyzed from March 2023 through January 2026.
Across all 3 datasets, individuals with depression diagnosis or higher depression symptoms showed greater reinforcement tendency from likes (dataset 1: β = .013, P = .002; dataset 2: β = .026, P = .03; dataset 3 [preregistered]: β = .008, P = .02). In dataset 3, this was specific to an anxious-depression transdiagnostic factor, not a compulsivity/intrusive thought factor.
- Cross-sectional design limits causal inference (it is unclear whether social media use worsens depression or depression drives social media behavior). - Depression measurement differed across datasets (self-disclosure, past 4-week severity, validated questionnaire), limiting direct comparability. - Data are limited to Twitter/X users, reducing generalizability to other platforms and demographics.
Patients with depression may be especially sensitive to social-reward feedback loops on social media — a pattern distinct from the blunted reinforcement seen in lab settings. Clinicians should consider asking depressed patients about their social media habits, as compulsive like-seeking behavior may be a clinically relevant symptom target.
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