User:Renklauf/Barnstarred Editors Analyses

Overview

The E3 team has been monitoring English Wikipedia editors as they make their 1000th main namespace edit. Upon notification of this threshold being broken for each editor a barnstar is delivered by staff to the editor.

Barnstarred Editors with Timestamps of Barnstar receipt - as of May 17th 2012

Gareth Griffith-Jones 20120405102105 Gamer9832 20120405104914 TheJJJunk 20120405181336 Amateur55 20120406023957 YuMaNuMa 20120406150220 Haruo 20120406191455 Arius1998 20120412170412 TheXenomorph1 20120412170518 Ferret 20120412170729 Pmccawley 20120412170835 Wesley Mouse 20120412171142 Nickyp88 20120412171247 Rschwieb 20120412171353 Cactus Wren 20120412171600 Jim Craigie 20120412171705 Mauri96 20120412171811 Skteosk 20120412172118 Al Silonov 20120412172325 Ne0Freedom 20120412172325 GrahamSmith 20120412172431 Soulparadox 20120412172537 Melbourne.sport 20120412172643 NBA Fan44 20120412172643 Graemp 20120412172748 Peter Deer 20120412172748 Khanassassin 20120412172854 Paris1127 20120412172854 WtW-Suzaku 20120412172854 Glennwells 20120412173000 Egeymi 20120412173107 MadSkilz252 20120412173107 Jessemv 20120412173213 Element16 20120412205041 Khani100 20120412222120 Staszek Lem 20120412234552 Nbdelboy 20120412235203 Frankm.russo 20120413020123 Hanchi 20120413022351 Caidh 20120413032336 Mklobas 20120413180522 Thom2002 20120413180522 Flyingidiot 20120413185154 Hoalong 20120413210923 Miguel raul 20120414051014 Hounder4 20120414110756 Fahim Talha 20120414153638 Mewulwe 20120414172648 DoctorKubla 20120414182225 DanWiki2011 20120414203347 Candleabracadabra 20120414203956 Isa Roarte 20120414222301 Ducknish 20120414223111 Tom.Reding 20120415065612 Alexxander3000 20120415144453 MauriManya 20120415145000 Nostalgiacritic 20120415162200 Aliw136 20120415170330 RioHondo 20120415175308 Davykamanzi 20120415185348 Mjs1991 20120415231124 Daniel E. Romero 20120416000300 Ultimate Destiny 20120416031357 Nitefirre 20120416070114 A3 nm 20120416112756 Q Chris 20120416122336 Wikiukas 20120417103642 Anatomist90 20120417135441 Mugregg 20120417145320 Thefrood 20120417151839 Sumone10154 20120417210004 ZZ47 20120418110321 Thakaran 20120418150949 Prawn3944 20120418161431 Robynloud 20120418162141 Zamyusoff 20120419043652 Hallucegenia 20120419092946 Biosthmors 20120419180649 Hippo99 20120419210537 Meiskam 20120419222629 GinGin-1995 20120420063020 AnelZukic 20120420084040 Marcusaurelius161 20120420142005 Lmmnhn 20120420143216 Impru20 20120420144026 Charles Edwin Shipp 20120420190505 Andyross 20120420230530 Lpmfx 20120421012254 Hgb1217 20120421050910 Parsica 20120421133307 Melvalevis 20120421145057 F=q(E+v^B) 20120421181903 Monstrelet 20120421184020 TangoTizerWolfstone 20120421200413 Castncoot 20120421214919 Mizzou415 20120422025120 Wikielwikingo 20120422030936 Funnysheep 20120422085305 Wa3frp 20120422120905 Richardw 20120422132353 IxK85 20120422140119 Andy5421 20120422142940 Guest2625 20120422180549 Anxietycello 20120422202415 Uvghifds 20120422211752 JNicol 20120423082523 Smarojit 20120423083735 ElijahBosley 20120423135947 DLinth 20120423171948 ButOnMethItIs 20120423174004 22dragon22burn 20120423202546 Mttll 20120424091720 Guy Macon 20120424115055 A Werewolf 20120424163445 MasashiInoue 20120424182654 Mballen 20120424190923 Apteva 20120425004845 Gothicfilm 20120425095611 Sarahj2107 20120425115325 Gevorg89 20120425153639 Dac04 20120425162412 Bigshowandkane64 20120425185343 GWFrog 20120425191701 AnonymousAnimus 20120426125222 99puntos 20120426223005 Ceradon 20120427020525 DeknMike 20120427040640 Friends147 20120427141940 Mortyman 20120427174444 Ldavid1985 20120427233208 Bowei Huang 2 20120427235829 Darkslug 20120428002851 Arcandam 20120428025017 Percivl 20120428033850 Gook14 20120428055719 The1337gamer 20120428121604 Narutolovehinata5 20120428140311 Nocturnal781 20120429044346 Ghughesarch 20120429122620 Clithering 20120429141126 Arzun 20120429172726 JustPotteringAround 20120430012310 Sainsf 20120502120411 Letdemsay 20120502222510 Hahc21 20120502231149 MasterMind5991 20120502234520 Farsight001 20120503000738 Spike-from-NH 20120503005712 Amkilpatrick 20120503070253 Esc2003 20120503142113 Свифт 20120503161022 HLE 20120503165654 Ivolocy 20120503175029 JG66 20120510035653 Bushy moustache 20120510104500 Dusty777 20120510180235 MrNiceGuy1113 20120510191825 Maxtremus 20120510230339 Amolbot 20120510230746 AutomaticStrikeout 20120511012108 Arussom 20120511031620 GrindtXX 20120511112210 AnkhMorpork 20120511132224 Natureguy1980 20120511192103 IShadowed 20120512001608 FrankPoncherello 20120512053827 Willdude123 20120512112752 TaalVerbeteraar 20120512121122 Apwoolrich 20120512160745 G0700596 20120512184119 Erminameraz 20120512221429 Suredeath 20120512234025 Jihadcola 20120512234432 ZappaOMati 20120513005116 Danrolo 20120513162934 Adg1996 20120513173919 Pasicles 20120513225428 Smartie2thaMaxXx 20120514013204 Knightserbia 20120514033017 Small5th 20120514064214 Syafiq hazmy 20120514141037 F Ceragioli 20120514183112

Analysis

The list of editors meeting the threshold over the past few months, along with the timestamps on which each user received the barnstar, was used to generate counts of namespace 0 edits in the three days following the delivery of the barnstar. A second list of similar counts was also generated with the timestamp preceding the delivery of the barnstar by 90 days. The edit count distributions were used to produce a binomial variable: "The user edited at least once in the three days following the timestamp". Comparing this variable among the two groups indicates that increased edit activity was a strong predictor of being barnstarred.

In the test (post barnstar) group 89% of users made in edit in the three day period following the barnstar. In the earlier three day period only 44.5% of users went on to make any edits. While this could certainly be partly due to seasonal or editor lifetime dependency on edits the effect is strong that the barnstarring would almost certainly be a significant factor here.

Logistic Regression Analysis, Registered Users, Edit Events - R Output

Call: glm(formula = template ~ metric, family = binomial(link = "logit"), data = temp_df) Deviance Residuals: Min 1Q Median 3Q Max -1.4823 -0.6011 0.1497 0.9005 1.8974 Coefficients: Estimate Std. Error z value Pr(>|z|) (Intercept) -1.6194 0.2447 -6.617 3.68e-11 *** metric 2.3125 0.2800 8.258 < 2e-16 *** --- Signif. codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 (Dispersion parameter for binomial family taken to be 1) Null deviance: 504.61 on 363 degrees of freedom Residual deviance: 417.84 on 362 degrees of freedom AIC: 421.84 Number of Fisher Scoring iterations: 4 "Samples in test:" 182 [1] "Summary of metric for test:" Min. 1st Qu. Median Mean 3rd Qu. Max. 0.0000 1.0000 1.0000 0.8901 1.0000 1.0000 [1] "Summary of metric for control:" Min. 1st Qu. Median Mean 3rd Qu. Max. 0.0000 0.0000 0.0000 0.4451 1.0000 1.0000

The three day period before the barnstarring was compared to three day periods at other points in the editor lifetimes. Only editors that hd made at least one edit previously in each period was observed. The periods observed begin at: The timestamp of the barnstarring (ToB), 30 days previous to ToB, 60 days previous to ToB, 90 days previous to ToB, ... , 360 days previous to Tob. As can be seen in the plots below the barnstarring had a drastic effect on editing volume and prevalence (the ToB period is the first bar in each plot).

• Comparing three day period after barnstarring to earlier periods at 30 day intervals.
• 
  Fig. 1 - Mean edits/user for barnstarred users
• 
  Fig. 2 - Editors making at least one edit

Future Steps

Given that the analysis yielded strong results looking at an earlier period in the lifetime of the subject editors it would be very advisable to repeat this analysis using an independent group of controlled editors - that is editors that reach 1000 edits and do not receive barnstars.