Can social media engagement be explained by reward learning? Yes! In our new preprint (w. @david_m_amodio), we use RL modeling to explain the posting behavior of 4000+ individuals on several social media platforms: psyarxiv.com/78mh5 summary follows: (1/7) We modeled how people on social media space their posts conditional on their history of likes, based on theory of animal free-operant behavior (by e.g, @yael_niv ). If the reward rate is high, responses should be faster = shorter latency between social media posts (2/7)