Wikipedia article depth

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The depth or editing depth of Wikipedia is one of several possible rough indicators of the encyclopedia's collaborative quality, showing how frequently its articles are updated.

It does not refer to academic quality, which cannot be computed, but to Wikipedian quality, i.e. the depth of collaborativeness—a descriptor that is highly relevant for a Wikipedia.

Definition

The formula assumes that a relatively high number of page edits and the presence of support pages means articles have been updated. And the latter support pages are assumed to be a more important factor.

In the list of Wikipedias, depth is currently defined as:

$\text{Depth}=\frac{\text{Edits}}{\text{Articles}}\cdot \frac{\text{NonArticles}}{\text{Articles}}\cdot \left( 1-\frac{\text{Articles}}{\text{Total}} \right)$

The depth can be simplified to the equivalent formula below:

$\text{Depth}=\frac{\text{Edits}}{\text{Total}}\cdot \left( \frac{\text{NonArticles}}{\text{Articles}} \right)^{2}$

NonArticles are user pages, redirects, images, "project" pages, categories, templates, and all talk pages. Total is simply NonArticles + Articles.

English Wikipedia has depth of 881 = 21.69 × 40.64 and is the deepest one for Wikipedias with number of articles greater than 10000.

The largest depth for the unblocked Wikipedias has Aromanian Wikipedia which has the depth 658 = 49.48 × 13.3.

The smallest depth has Minangkabau Wikipedia which has the depth 0.0019 = 2.12 × 0.0009.

Background

The measurement of depth was introduced after some limitations of the classic measurement of article count were realized. This insight is similar to the various suggestions to redefine the ordering of Wikipedias that appear on the international front page www.wikipedia.org. See Top Ten Wikipedias and Talk:Www.wikipedia.org portal.

Still in early February 2006 the list of Wikipedias only listed the article count. But on February 10, 2006, this changed into a table format that also listed the total edit count, number of users and admins.

The depth column first appeared on November 29, 2006. The initial definition was edits/articles, giving the English Wikipedia a value of 62. This definition changed already the next day to (Edits/Articles) × (Non-Articles/Articles), giving the English Wikipedia a value of 209. The next definition change occurred on October 9, 2007, when the Stub-ratio factor was appended. The stub ratio is (1-(Articles/Total)).[1] The new value for the English Wikipedia was 288. The formula changed again on October 17, October 28, and finally on April 11, 2008.

The discussion of the introduction of the depth parameter is found in Talk:List of Wikipedias/Archive 4. Early on, there were discussions of whether depth implies quality. The changes in October 2007 were discussed in Talk:List of Wikipedias/Archive 5#Depth 2.0.

10 000+ articles

The table shows the list of Wikipedias with over 10,000 articles sorted by Depth.

N.B.: Table sorted by Depth on 26 November 2014.

No. Language Language (local) Wiki Depth Articles Edits Total
1 English English en 881.23 4,659,221 745,140,137 34,359,701
2 Bengali বাংলা bn 490.67 33,086 1,798,617 361,779
3 Macedonian Македонски mk 488.13 79,784 3,373,699 1,074,650
4 Malayalam മലയാളം ml 290.22 37,327 2,168,298 255,695
5 Egyptian Arabic مصرى arz 261.16 13,121 658,137 92,701
6 Hebrew עברית he 256.46 163,812 17,174,980 689,388
7 Thai ไทย th 251.64 90,793 6,028,384 509,506
8 Serbo-Croatian Srpskohrvatski / Српскохрватски sh 251.39 274,773 8,073,211 2,874,273
9 Turkish Türkçe tr 209.97 236,730 15,828,867 1,168,908
10 Arabic العربية ar 193.1 341,390 17,113,284 1,937,681
11 French Français fr 190.98 1,565,623 111,833,691 6,965,291
12 Bosnian Bosanski bs 186.66 55,227 2,712,973 310,480
13 Spanish Español es 175.68 1,141,023 83,891,292 4,733,411
14 Persian فارسی fa 165.83 433,245 18,531,574 2,470,138
15 Urdu اردو ur 153.86 62,437 4,089,146 256,349
16 Sorani کوردی ckb 139.41 14,973 476,350 93,154
17 Chinese 中文 zh 129.05 797,470 34,835,657 3,782,671
18 Simple English Simple English simple 127.54 118,218 12,336,684 339,794
19 Portuguese Português pt 124.17 851,946 41,776,374 3,663,005
20 Russian Русский ru 114.65 1,166,775 79,378,027 3,955,610
21 Italian Italiano it 104.64 1,159,690 74,670,376 3,855,158
22 Hungarian Magyar hu 99.14 270,839 16,029,641 915,188
23 Romanian Română ro 97.09 255,188 9,280,524 1,134,215
24 Ossetian Иронау os 95.13 9,936 477,497 36,862
25 Latvian Latviešu lv 94.6 57,156 2,314,519 233,867
26 German Deutsch de 89.22 1,781,019 141,885,233 4,910,757
27 Korean 한국어 ko 83.65 295,749 15,058,619 988,913
28 Aragonese Aragonés an 82.13 30,297 1,596,476 98,493
29 Venetian Vèneto vec 76.16 10,482 579,498 31,966
30 Bavarian Boarisch bar 73.83 10,554 439,552 36,789
31 Danish Dansk da 69.89 193,240 8,220,221 646,194
32 Japanese 日本語 ja 68.91 935,870 54,689,343 2,644,006
33 Sinhalese සිංහල si 67.96 11,573 329,679 47,962
34 Marathi मराठी mr 64.99 40,868 1,329,502 152,423
35 Serbian Српски sr 64.88 311,582 10,885,707 1,114,717
36 Indonesian Bahasa Indonesia id 64.42 350,907 9,302,920 1,470,744
37 Welsh Cymraeg cy 64.06 60,646 5,228,846 140,097
38 Yiddish ייִדיש yi 60.81 11,463 507,543 34,906
39 Uzbek O‘zbek uz 58.15 127,753 2,297,850 643,131
40 Hindi हिन्दी hi 57.76 116,259 2,755,820 488,115
41 Kannada ಕನ್ನಡ kn 44.84 17,118 472,976 56,864
42 Finnish Suomi fi 44.4 360,506 15,335,638 962,180
43 Greek Ελληνικά el 43.58 112,491 5,074,775 290,014
44 Icelandic Íslenska is 43.4 38,408 1,530,884 104,526
45 Sakha Саха тыла sah 42.92 10,665 335,312 32,374
46 Georgian ქართული ka 39.6 86,637 2,885,628 245,744
47 Czech Čeština cs 38.78 309,292 12,430,713 796,949
48 Min Nan Bân-lâm-gú zh-min-nan 38.33 11,383 464,239 28,995
49 Tamil தமிழ் ta 37.36 65,004 1,840,684 193,986
50 Tagalog Tagalog tl 36.9 63,001 1,525,647 202,392
51 Ukrainian Українська uk 36.54 539,399 15,392,265 1,586,117
52 Mongolian Монгол mn 35.88 13,705 430,845 38,127
53 Sanskrit संस्कृतम् sa 35.05 10,240 287,445 29,741
54 Quechua Runa Simi qu 34.78 19,193 654,088 50,707
55 Afrikaans Afrikaans af 34.71 33,713 1,363,675 82,592
56 Swahili Kiswahili sw 34.71 27,214 979,361 70,113
57 Croatian Hrvatski hr 34.12 149,850 4,585,625 412,306
58 Armenian Հայերեն hy 33.71 139,753 2,703,724 482,527
59 Cantonese 粵語 zh-yue 33.08 33,559 933,505 95,191
60 Belarusian (Taraškievica) Беларуская (тарашкевіца) be-x-old 32.59 54,914 1,826,702 142,461
61 Malagasy Malagasy mg 32.15 47,065 730,813 179,215
62 Lombard Lumbaart lmo 32.06 31,432 1,048,181 80,865
63 Low Saxon Plattdüütsch nds 30.86 22,212 764,489 55,442
64 Estonian Eesti et 30.84 128,630 4,181,920 328,974
65 Catalan Català ca 30.27 442,903 14,752,991 1,111,807
66 Luxembourgish Lëtzebuergesch lb 30.03 42,156 1,867,505 93,981
67 Azerbaijani Azərbaycanca az 29.8 100,300 3,297,321 251,367
68 Bulgarian Български bg 26.94 169,766 6,729,181 378,833
69 Alemannic Alemannisch als 26.89 17,657 614,394 41,435
70 Albanian Shqip sq 26.56 51,871 1,622,178 126,525
71 Norwegian (Bokmål) Norsk (Bokmål) no 25.99 435,675 14,606,676 1,023,683
72 Kurdish Kurdî ku 25.86 20,846 661,926 49,973
73 Basque Euskara eu 25.18 204,579 4,844,313 550,724
74 Faroese Føroyskt fo 24.7 10,717 309,677 26,214
75 Bishnupriya Manipuri বিষ্ণুপ্রিয়া মণিপুরী bpy 23.29 25,126 803,766 57,581
76 Neapolitan Nnapulitano nap 23.24 14,278 688,918 28,205
77 Telugu తెలుగు te 22.99 59,667 1,333,302 158,218
78 Walloon Walon wa 22.48 13,590 318,553 34,922
79 Tatar Татарча tt 21.69 64,777 2,060,932 144,709
80 Slovenian Slovenščina sl 21.49 143,032 4,477,139 320,405
81 Belarusian Беларуская be 21.32 77,836 1,966,337 189,375
82 Sicilian Sicilianu scn 20.15 24,598 738,245 54,638
83 Scots Scots sco 19.9 27,737 453,380 79,580
84 Amharic አማርኛ am 19.88 16,231 332,538 41,928
85 Galician Galego gl 19.76 118,222 3,499,951 262,001
86 Polish Polski pl 19.67 1,078,151 41,088,873 2,179,557
87 Vietnamese Tiếng Việt vi 19.52 1,110,441 20,140,872 3,005,472
88 Nahuatl Nāhuatl nah 19.1 10,146 398,223 20,112
89 Punjabi ਪੰਜਾਬੀ pa 19.12 15,936 220,280 48,702
90 Lithuanian Lietuvių lt 19.07 168,752 4,855,204 373,032
91 Slovak Slovenčina sk 18.53 196,566 5,933,547 422,325
92 Asturian Asturianu ast 18.16 19,803 788,578 38,432
93 Norwegian (Nynorsk) Nynorsk nn 17.74 118,015 2,886,852 270,047
94 Esperanto Esperanto eo 17.67 206,017 5,651,994 450,484
95 Breton Brezhoneg br 17.43 51,587 1,681,705 105,535
96 Volapük Volapük vo 15.46 119,371 3,300,270 248,041
97 Sundanese Basa Sunda su 15.31 17,743 461,316 37,547
98 West Frisian Frysk fy 14.49 31,141 738,840 66,786
99 Malay Bahasa Melayu ms 14.05 271,052 3,876,838 703,994
100 Nepali नेपाली ne 13.69 27,270 438,852 66,573
101 Newari नेवारी new 12.65 70,946 823,275 193,203
102 Javanese Basa Jawa jv 11.44 48,246 909,598 103,231
103 Interlingua Interlingua ia 11.4 14,334 551,624 24,541
104 Swedish Svenska sv 11.06 1,949,201 28,869,456 4,512,441
105 Latin Latina Latina 10.46 111,857 2,902,054 208,952
106 Dutch Nederlands nl 8.99 1,798,993 43,567,713 3,278,269
107 Bashkir Башҡорт ba 8.7 33,297 456,560 72,423
108 Kazakh Қазақша kk 8.37 209,388 2,269,905 491,201
109 Gujarati ગુજરાતી gu 8.15 25,587 379,044 52,870
110 Banyumasan Basa Banyumasan map-bms 7.75 13,054 203,088 26,075
111 Samogitian Žemaitėška bat-smg 7.1 13,686 334,890 23,307
112 Irish Gaeilge ga 6.51 32,341 767,930 54,272
113 Tajik Тоҷикӣ tg 6.17 30,489 459,367 57,204
114 Scottish Gaelic Gàidhlig gd 5.67 17,689 493,267 27,659
115 Mazandarani مَزِروني mzn 5.38 12,015 129,563 24,009
116 Occitan Occitan oc 5.32 87,895 2,088,586 140,454
117 Yoruba Yorùbá yo 5.27 31,058 546,255 53,340
118 Ido Ido io 5.05 26,133 925,005 38,038
119 Chuvash Чăваш cv 4.38 30,199 547,637 49,137
120 Cebuano Sinugboanong Binisaya ceb 3.54 1,208,468 5,768,449 2,790,166
121 Waray-Waray Winaray war 3.54 1,258,833 6,248,177 2,862,752
122 Piedmontese Piemontèis pms 1.97 63,656 848,549 93,278
123 Kirghiz Кыргызча ky 1.35 27,433 187,351 42,622
124 Burmese language မ္ရန္‌မာစာ my 1.11 32,395 221,804 48,353
125 Buginese Basa Ugi bug 0.91 14,089 197,054 18,178
126 Western Panjabi شاہ مکھی پنجابی pnb 0.46 33,223 415,011 40,207
127 Haitian Krèyol ayisyen ht 0.28 53,147 706,553 61,388
128 Chechen Нохчийн ce 0.19 68,469 403,645 81,978
129 Minangkabau Bahaso Minangkabau min 0.002 221,140 482,829 227,824
No. Language Language (local) Wiki Depth Articles Edits Total

Trends

Trend during 2008.

The table shows how the depth of the largest 30 languages[2] of Wikipedia has developed over time.

Date en de fr pl ja it nl pt es ru sv zh no fi ca uk tr ro vo cs hu eo sk da id he ar ko lt sr
Today 881 89 191 20 69 105 9 124 176 115 11 129 26 44 30 37 210 97 15 39 99 18 19 70 64 256 193 84 19 65
1 July 2013 769 89 164 19 64 95 9 112 170 106 15 100 28 45 26 38 212 88 15 39 100 18 18 66 112 249 235 82 18 64
1 Jan 2013 731 89 165 17 61 91 18 103 175 104 38 108 28 44 24 38 214 81 15 38 99 18 15 62 88 242 243 77 17 57
1 July 2012 688 88 157 16 58 89 19 96 166 99 44 148 28 44 22 36 207 101 13 38 98 17 15 58 89 236 241 76 16 52
1 Jan 2012 648 89 151 14 56 85 18 88 158 92 50 90 29 44 20 35 207 97 12 37 92 16 24 39 72 231 230 74 17 51
1 July 2011 613 89 145 13 54 81 30 82 163 91 48 83 27 43 18 34 192 93 12 37 90 16 22 36 63 227 225 71 17 47
1 Jan 2011 572 87 140 10 51 77 29 71 179 90 46 80 25 41 17 33 185 86 11 34 86 16 20 35 61 220 208 62 17 40
1 July 2010 522 88 139 11 49 75 30 77 189 91 35 68 24 39 18 31 177 73 10 32 81 15 19 34 61 208 197 51 19 47
1 Jan 2010 478 86 128 10 46 71 27 74 141 87 31 63 23 37 17 25 159 54 9 33 71 14 16 31 42 205 167 43 19 46
1 July 2009 440 84 121 10 43 66 25 71 116 81 28 63 22 35 17 26 132 36 8 32 70 13 14 28 35 184 142 39 17 56
1 Jan 2009 413 81 115 9 41 57 23 66 94 74 24 71 20 32 17 15 95 30 8 28 64 13 10 26 30 177 117 36 15 52
1 July 2008 368 77 101 8 38 47 21 58 69 63 19 56 20 30 15 10 66 25 8 26 51 12 8 24 24 159 108 34 14 46
1 Jan 2008 302 70 79 9 33 43 20 49 51 56 15 59 18 27 14 12 43 17 3 24 39 11 7 21 20 132 107 27 12 35
1 July 2007 320 100 59 15 36 59 23 31 39 32
1 Jan 2007 224 87 45 12 32 37 19 25 34 24