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1、AnalyzingCostsandAccuracyofValidationMechanismsforCrowdsourcingPlatformsMatthiasHirth,TobiasHoßfeld,PhuocTran-GiaUniversityofW¨urzburg,InstituteofComputerScience,GermanyEmail:[matthias.hirth
2、tobias.hossfeld
3、phuoc.trangia]@informatik.uni-wuerzburg.deAbstr
4、actCrowdsourcingisbecomingmoreandmoreimportantforcommercialpur-poses.WiththegrowthofcrowdsourcingplatformslikeAmazonMechanicalTurkorMicroworkers,ahugeworkforceandalargeknowledgebasecanbeeasilyaccessedandutilized.Butduetotheanonymityoftheworkers,theyareen
5、couragedtocheattheemployersinordertomaximizetheirincome.Thus,thispaperweanalyzetwowidelyusedcrowd-basedapproachestoval-idatethesubmittedwork1.Bothapproachesareevaluatedwithregardtotheirdetectionquality,theircostsandtheirapplicabilitytodifferenttypesoftypi
6、calcrowdsourcingtasks.Keywords:Crowdsourcing;QualityAssurance;CostEstimation1.IntroductionWiththetremendousgrowthoftheInternet’suserbase,ahugeworkforcewithalargeamountofknowledgehasbeendeveloped.ThisisalreadyutilizedinprojectsliketheWikipedia,whereusersc
7、reatedanencyclopediabysharingtheirknowledge,orOpenStreetMapwhichoffersmapsfromallovertheworldbasedoninformationgatheredbyitsusers.Anewapproachtousethisworkforceandthewisdomofthecrowdisreferredtoascrowdsourcing.Crowdsourcingcanbeviewedasafurtherdevelopment
8、ofoutsourcing.JeffHowedefinedcrowdsourcingas”...theactoftakingajobtraditionallyperformedbyadesignatedagent(usuallyanemployee)andoutsourcingittoanundefined,generallylargegroupof1Thispaperisanextendedversionof[8]PreprintsubmittedtoIS:FutureMobileNetworksMarch
9、13,2012peopleintheformofanopencall”[11].Themaindifferencestooutsourcingarethattheentrepreneurdoesnotknowwhoaccomplisheshistaskandthattheworkersdonotformanorganizedgroupbutaremembersofalargeanonymouscrowd.Intraditionalworkorganization,theemployerdelegatesw
10、orktotheworkers,butinthecrowdsourcingapproach,theworkerchooseswhichtaskshewantstoworkfor.Atthebeginningcrowdsourcingwasoftenusedfornon-profitapplica-tions.ButwiththethedevelopmentofplatformslikeAmazonMechanicalTurk(MTurk)or
