In this paper, we propose a characterization of social media users based on language usage over time in order to make more rigorous the notions of organic and inorganic online behavior. This characterization describes the extent to which a user’s word usage within a particular time period subverts expectations based on preceding time periods. To do this, we adapt the use of an information theoretic measure of cognitive surprise and apply it to a set of behaviorally diverse Twitter users. We then compare the language-production dynamics across users based on term frequencies at multiple levels of granularity. We then illustrate the intuition behind this characterization through case studies of salient users identified from this method. Through these case studies, we find that this characterization can be linked to the degree to which a user’s word usage is organic, inorganic, or a mixture of both.
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The reason for doing so is to ensure that each group of tweets represents a roughly equal amount of linguistic activity, regardless of the time spanned by each grouping. If we were to instead group tweets based on a fixed unit of time (e.g., grouping all tweets from the same month), we would run into a serious problem in cases where a user has periods of lessened tweet activity. Such periods of fewer tweets would result in sparser word distributions, which would cause the calculated surprise (detailed in the following section) to be arbitrarily high. To put it more simply, if we want to compare a user’s tweet to the tweet before it, the time lag between the two tweets is irrelevant—the last tweet simply represents the most recent action of the user and thus all that we have available to make our comparison.
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The authors wish to thank Stefano Cresci and colleagues for generously making the dataset available to us. This research is funded in part by the U.S. National Science Foundation (IIS-1636933, ACI-1429160, and IIS-1110868), U.S. Office of Naval Research (N00014-10-1-0091, N00014-14-1-0489, N00014-15-P-1187, N00014-16-1-2016, N00014-16-1-2412, N00014-17-1-2605, N00014-17-1-2675, N00014-19-1-2336), U.S. Air Force Research Lab, U.S. Army Research Office (W911NF-16-1-0189), U.S. Defense Advanced Research Projects Agency (W31P4Q-17-C-0059), Arkansas Research Alliance, and the Jerry L. Maulden/Entergy Endowment at the University of Arkansas at Little Rock. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the funding organizations. The researchers gratefully acknowledge the support.
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Stine, Z.K., Agarwal, N. Characterizing the language-production dynamics of social media users. Soc. Netw. Anal. Min. 9, 60 (2019) doi:10.1007/s13278-019-0605-7
- Social media
- Human–computer interaction
- Natural language processing
- Computer-mediated communication
- Information theory