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[edit]

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 869 = 21.79 × 39.89 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 3467 = 58.9 × 58.87.

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

Background[edit]

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.

100 000+ articles[edit]

The table shows the list of Wikipedias with over 100,000 articles sorted by Depth.
Data on this page is automatically updated every day (Purge).

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

No. Language Language (local) Wiki Depth Articles Edits Total
1 English English en 869.2 4,569,570 728,463,372 33,429,691
2 Hebrew עברית he 255.94 159,673 16,674,783 672,775
3 Arabic العربية ar 238.38 289,389 16,313,254 1,754,804
4 Turkish Türkçe tr 209.87 231,632 15,526,177 1,141,517
5 French français fr 182.43 1,529,447 108,116,495 6,654,454
6 Spanish español es 174.41 1,115,559 81,362,164 4,629,980
7 Persian فارسی fa 170.66 402,947 17,750,887 2,296,188
8 Serbo-Croatian srpskohrvatski / српскохрватски sh 154.37 201,421 5,755,130 1,463,325
9 Simple English Simple English simple 130.2 114,923 12,241,150 330,343
10 Portuguese português pt 122.25 834,177 40,752,184 3,560,263
11 Chinese 中文 zh 115.74 780,449 33,461,969 3,493,369
12 Russian русский ru 113.83 1,134,070 76,816,300 3,838,939
13 Italian italiano it 100.87 1,140,547 72,573,451 3,741,375
14 Hungarian magyar hu 99.49 263,449 15,612,034 891,335
15 Romanian română ro 95.67 250,211 9,106,850 1,101,284
16 German Deutsch de 89.7 1,741,007 138,365,007 4,817,800
17 Korean 한국어 ko 80.34 283,851 14,551,662 925,470
18 Danish dansk da 70.12 190,040 8,079,534 636,781
19 Japanese 日本語 ja 67.79 920,061 53,474,429 2,585,959
20 Serbian српски / srpski sr 62.55 250,119 10,229,563 805,032
21 Indonesian Bahasa Indonesia id 61.43 345,661 9,106,175 1,412,754
22 Uzbek oʻzbekcha uz 57.79 127,664 2,288,279 641,555
23 Hindi हिन्दी hi 51.32 113,572 2,512,356 462,770
24 Greek Ελληνικά el 46.74 106,312 4,906,821 279,896
25 Finnish suomi fi 44.97 351,372 15,055,442 940,204
26 Czech čeština cs 38.93 300,415 12,096,049 774,812
27 Armenian Հայերեն hy 36.31 125,740 2,485,319 447,132
28 Ukrainian українська uk 36.28 517,396 14,795,427 1,514,546
29 Croatian hrvatski hr 34.86 146,846 4,531,192 406,535
30 Estonian eesti et 30.99 125,341 4,080,222 321,089
31 Azerbaijani azərbaycanca az 30.5 102,071 3,164,461 265,113
32 Catalan català ca 29.96 431,818 14,288,253 1,082,391
33 Bulgarian български bg 27.77 163,862 6,608,749 367,463
34 Basque Euskara eu 27.05 189,602 4,720,322 515,488
35 Norwegian (Bokmål) norsk bokmål no 26.24 426,517 14,354,189 1,004,411
36 Slovene slovenščina sl 21.26 141,608 4,405,306 316,675
37 Galician galego gl 19.62 115,127 3,427,068 253,942
38 Polish polski pl 18.44 1,056,720 39,985,773 2,095,531
39 Slovak slovenčina sk 18.45 193,760 5,854,817 415,473
40 Esperanto Esperanto eo 18.28 199,331 5,584,270 437,985
41 Vietnamese Tiếng Việt vi 18.05 1,104,989 18,926,588 2,962,425
42 Lithuanian lietuvių lt 17.94 166,232 4,802,888 358,618
43 Norvegian (Nynorsk) norsk nynorsk nn 17.83 115,287 2,863,254 262,766
44 Volapük Volapük vo 15.52 119,152 3,298,528 247,838
45 Malay Bahasa Melayu ms 14.16 266,710 3,828,847 693,917
46 Swedish svenska sv 11.03 1,786,315 26,680,962 4,116,347
47 Latin Latina la 10.33 109,856 2,867,006 204,075
48 Dutch Nederlands nl 8.74 1,784,677 42,772,177 3,236,066
49 Kazakh қазақша kk 8.31 208,297 2,231,762 489,489
50 Cebuano Cebuano ceb 3.28 1,054,892 5,063,859 2,359,343
51 Waray-Waray Winaray war 3.17 1,073,725 5,502,978 2,311,867
52 Minangkabau Baso Minangkabau min 0.002 221,041 481,627 227,615


Trends[edit]

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 869 90 182 18 68 101 9 122 174 114 11 116 26 45 30 36 210 96 16 39 99 18 18 70 61 256 238 80 18 63
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

See also[edit]

Notes[edit]

  1. List of Wikipedias
  2. At November 2008.