Kooti, FarshadMoro, EstebanLerman, Kristina2020-03-232020-03-232016-10-19Spiro, Emma; Ahn, Yong-Yeol, (eds.) Social Informatics: SocInfo 2016, Bellevue, WA, USA, November 11–14, 2016 Proceedings, Part II. New York: Springer. Pp.: 71-86. (Lecture notes in computer science; 10047).978-3-319-47873-9 (print)978-3-319-47874-6 (online)https://hdl.handle.net/10016/30014[Proceeding of]: 8th International Conference (SocInfo 2016), Bellevue, WA, USA, November 11-14, 2016.Human behavior shows strong daily, weekly, and monthlypatterns. In this work, we demonstrate online behavioral changes thatoccur on a much smaller time scale: minutes, rather than days or weeks.Specifically, we study how people distribute their effort over differenttasks during periods of activity on the Twitter social platform. Wedemonstrate that later in a session on Twitter, people prefer to perform simpler tasks, such as replying and retweeting others' posts, ratherthan composing original messages, and they also tend to post shortermessages. We measure the strength of this effect empirically and statistically using mixed-effects models, and find that the first post of a sessionis up to 25 % more likely to be a composed message, and 10-20 % lesslikely to be a reply or retweet. Qualitatively, our results hold for differentpopulations of Twitter users segmented by how active and well-connectedthey are. Although our work does not resolve the mechanisms responsible for these behavioral changes, our results offer insights for improvinguser experience and engagement on online social platforms.15eng(c) Springer International Publishing AG 2016Online Social NetworkTwitter userActivity sessionSocial platformIndex coefficientconference paperInformáticaMatemáticashttps://doi.org/10.1007/978-3-319-47874-6_6open access711004786Social Informatics : 8th International Conference, SocInfo 2016, Bellevue, WA, USA, November 11-14, 2016, Proceedings, Part IICC/0000026943