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1、HumanCommunicationResearchISSN0360-3989ORIGINALARTICLEDimensionsofLeadershipandSocialInfluenceinOnlineCommunitiesDavidHuffakerMedia,TechnologyandSociety,NorthwesternUniversity,Evanston,IL60208,USAThepurposeofthisarticleistoexaminethecommunicationbehaviorsofonlineleaders,orthosewho
2、influenceothermembersofonlinecommunitiesintriggeringmessagereplies,sparkingconversation,anddiffusinglanguage.Itrelieson632,622messagesfrom33,450participantsacross16discussiongroupsfromGoogleGroupsthattookplaceovera2-yearperiod.Itutilizesautomatedtextanalysis,socialnetworkanalysis,
3、andhierarchicallinearmodelingtouncoverthelanguageandsocialbehaviorofonlineleaders.Thefindingsshowthatonlineleadersinfluenceothersthroughhighcommunicationactivity,credibility,networkcentrality,andtheuseofaffective,assertive,andlinguisticdiversityintheironlinemessages.doi:10.1111/j.1
4、468-2958.2010.01390.xOnlinecommunities,inwhichlargegroupsofInternetuserswithcommoninter-estsoractivitiescommunicateandshareresourceswithoneanother(Preece&Maloney-Krichmar,2003),constituteaconsiderableportionofInternetuse(Horrigan,2001).TheyformedearlyonthroughInternettechnologies
5、suchaselec-tronicmailinglists,chatrooms,andmultiuserdungeons(Baym,2000;Rheingold,2000;Turkle,1995)andmorerecentlymanifestthroughsocialnetworkingservicessuchasFacebookorMySpace,content-sharingWebsitessuchasYouTubeorFlickr,onlinediscussiongroupssuchasGoogleGroups,andavarietyofmessa
6、geboards.Evenblogs,inundatedwithcommentsfromloyalreadersorfirst-timeviewers,representathrivingandinfluentialonlinecommunity.Themembersoftheseonlinegroupscreateandshareinformationatanunprece-dentedlevel,resultinginmillionsofmessages,photos,orvideos,butmoreimportantlyopinions,ideas,a
7、ndafingeronthepulseoftheneedsandbeliefsofthemassiveaudiencethatmakesuptheInternet.Althoughthestudyofonlinediscussiongroupsbecameanearlyfocalpointforresearchers(Sudweeks,McLaughlin,&Rafaeli,1998),weknowlittleaboutcharacteristicsofindividualuserswhosparkcommunicationorinfluenceitscon
8、tent.Adeepunderstandingofthecommunicatio
