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We manually annotated the descriptions for 529 Mendeley groups, and correlated the appearances of the factors with two measures of the groups' outcomes: the changes in the numbers of group members and the changes of the articles shared within the groups between 2011 and 2012. Our results suggest that, in general, all four factors are important in online groups, which indicates the usefulness of traditional group theories in the study of online groups. In addition, although a majority of the factors have helped the growth of group size being higher than average increase, several factors have caused the increase of the shared articles within the groups to be smaller than average increase.<\/jats:p>","DOI":"10.1002\/meet.14504901256","type":"journal-article","created":{"date-parts":[[2013,1,24]],"date-time":"2013-01-24T10:49:23Z","timestamp":1359024563000},"page":"1-4","source":"Crossref","is-referenced-by-count":13,"title":["Groups in Mendeley: Owners' descriptions and group outcomes"],"prefix":"10.1002","volume":"49","author":[{"given":"Wei","family":"Jeng","sequence":"first","affiliation":[]},{"given":"Daqing","family":"He","sequence":"additional","affiliation":[]},{"given":"Jiepu","family":"Jiang","sequence":"additional","affiliation":[]},{"given":"Yang","family":"Zhang","sequence":"additional","affiliation":[]}],"member":"311","published-online":{"date-parts":[[2013,1,24]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1177\/105960118501000303"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.respol.2004.01.008"},{"issue":"2","key":"e_1_2_8_4_1","first-page":"346","article-title":"Community Effort in Online Groups: Who Does the Work and Why?","volume":"54","author":"Butler B.","year":"2002","journal-title":"Leadership at a Distance"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1177\/0093650205285368"},{"key":"e_1_2_8_6_1","doi-asserted-by":"publisher","DOI":"10.1017\/CBO9780511606632.023"},{"key":"e_1_2_8_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/S1048-9843(96)90024-7"},{"key":"e_1_2_8_8_1","doi-asserted-by":"crossref","unstructured":"Jiang J. He D. &Ni C.(2011).Social reference: aggregating online usage of scientific literature in CiteULike for clustering academic resources. InProceedings of JCDL \u201811 401\u2010402.","DOI":"10.1145\/1998076.1998155"},{"key":"e_1_2_8_9_1","unstructured":"Letierce J Passant A. Breslin J. G.&Decker S.(2010).Understanding how Twitter is used to spread scientific messages. InProceedings of the WebSci'10 April 26\u201027th 2010 Raleigh NC: US."},{"key":"e_1_2_8_10_1","doi-asserted-by":"crossref","unstructured":"Oh J. S. &Jeng W.(2011).Groups in Academic Social Networking Services \u2014 An Exploration of Their Potential as a Platform for Multi\u2010disciplinary Collaboration. In Proceeding of 2011 IEEE SocialCom.","DOI":"10.1109\/PASSAT\/SocialCom.2011.202"},{"key":"e_1_2_8_11_1","doi-asserted-by":"publisher","DOI":"10.1146\/annurev.psych.49.1.65"},{"key":"e_1_2_8_12_1","doi-asserted-by":"crossref","unstructured":"Priem J. &Costello K. L.(2010).How and why scholars cite on Twitter. 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