Halfaker is known for his research[12][13] about the decrease in the number of active editors on Wikipedia.[14][15][16] He has said in autumn 2013 that Wikipedia began a "decline phase" around 2007 and has continued to decline since then.[17][18] Halfaker has also studiedsoftware agents (bots) on Wikipedia,[19] and the way they affect new contributors to the site.[8] While a graduate student he developed a tool for Wikipedia editing called Snuggle with Stuart Geiger. Snuggle tacklesvandalism on Wikipedia and highlights constructive contributions by new editors.[20][21] He has also built anartificial intelligence (AI) service called Objective Revision Evaluation Service (ORES) in 2015, used to identify vandalism on Wikipedia and distinguish it fromgood faith edits.[22][23]
^Halfaker, Aaron; Kittur, Aniket; Riedl, John (2011). "Don't bite the newbies".Proceedings of the 7th International Symposium on Wikis and Open Collaboration. pp. 163–172.doi:10.1145/2038558.2038585.ISBN9781450309097.S2CID2818300.
^Panciera, Katherine; Halfaker, Aaron; Terveen, Loren (2009). "Wikipedians are born, not made".Proceedings of the 2009 ACM International Conference on Supporting Group Work. pp. 51–60.doi:10.1145/1531674.1531682.ISBN9781605585000.S2CID6286454.
^Halfaker, A.; Geiger, R. S.; Morgan, J. T.; Riedl, J. (28 December 2012). "The Rise and Decline of an Open Collaboration System: How Wikipedia's Reaction to Popularity Is Causing Its Decline".American Behavioral Scientist.57 (5):664–688.doi:10.1177/0002764212469365.S2CID144208941.
^Simonite, Tom (22 October 2013)."The Decline of Wikipedia".technologyreview.com. MIT Technology Review. Archived fromthe original on 19 June 2015. Retrieved13 March 2015.
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