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 20 July 2014.

No. Language Language (local) Wiki Depth Articles Edits Total
1 English English en 869.37 4,562,855 727,467,815 33,382,976
2 Hebrew עברית he 255.77 159,491 16,649,352 671,898
3 Arabic العربية ar 237.04 289,084 16,242,880 1,749,980
4 Turkish Türkçe tr 210.02 231,324 15,511,928 1,140,229
5 French français fr 182.08 1,527,412 107,945,501 6,638,627
6 Spanish español es 174.26 1,114,237 81,199,575 4,624,379
7 Persian فارسی fa 170.35 400,744 17,681,700 2,278,195
8 Serbo-Croatian srpskohrvatski / српскохрватски sh 160.55 196,154 5,694,359 1,450,583
9 Simple English Simple English simple 130.57 114,691 12,237,136 329,856
10 Portuguese português pt 122.14 833,441 40,696,459 3,556,338
11 Chinese 中文 zh 114.9 779,503 33,374,377 3,476,193
12 Russian русский ru 113.81 1,131,816 76,685,476 3,830,279
13 Italian italiano it 100.28 1,140,304 72,451,643 3,731,817
14 Hungarian magyar hu 99.09 263,075 15,565,082 888,894
15 Romanian română ro 95.43 249,855 9,093,217 1,097,996
16 German Deutsch de 89.66 1,738,713 138,160,097 4,810,936
17 Korean 한국어 ko 80.25 283,191 14,524,726 922,561
18 Danish dansk da 70.1 189,797 8,070,015 635,844
19 Japanese 日本語 ja 67.71 919,196 53,404,357 2,582,509
20 Serbian српски / srpski sr 62.65 249,768 10,221,832 804,354
21 Indonesian Bahasa Indonesia id 61.34 345,433 9,096,661 1,410,909
22 Uzbek oʻzbekcha uz 57.77 127,654 2,287,644 641,444
23 Hindi हिन्दी hi 51.02 113,466 2,506,998 461,007
24 Greek Ελληνικά el 47.21 105,713 4,897,214 279,118
25 Finnish suomi fi 45.02 350,879 15,040,937 939,148
26 Czech čeština cs 38.99 299,817 12,082,027 773,472
27 Armenian Հայերեն hy 36.78 124,672 2,475,011 445,413
28 Ukrainian українська uk 36.33 516,115 14,769,087 1,511,271
29 Croatian hrvatski hr 34.87 146,755 4,528,207 406,336
30 Estonian eesti et 31 125,221 4,076,810 320,795
31 Azerbaijani azərbaycanca az 30.5 101,922 3,157,832 264,863
32 Catalan català ca 29.93 431,453 14,267,076 1,081,322
33 Bulgarian български bg 27.78 163,584 6,601,631 366,835
34 Basque Euskara eu 27.04 189,413 4,717,491 514,773
35 Norwegian (Bokmål) norsk bokmål no 26.26 425,702 14,339,773 1,002,509
36 Slovene slovenščina sl 21.25 141,524 4,402,597 316,428
37 Galician galego gl 19.64 114,945 3,422,937 253,587
38 Polish polski pl 18.44 1,055,443 39,943,414 2,093,032
39 Slovak slovenčina sk 18.39 193,591 5,849,721 414,623
40 Esperanto Esperanto eo 18.29 198,941 5,578,572 437,110
41 Lithuanian lietuvių lt 17.95 166,116 4,800,737 358,408
42 Norvegian (Nynorsk) norsk nynorsk nn 17.9 115,029 2,861,712 262,378
43 Vietnamese Tiếng Việt vi 17.88 1,104,758 18,758,720 2,960,548
44 Volapük Volapük vo 15.52 119,153 3,298,486 247,837
45 Malay Bahasa Melayu ms 14.29 265,523 3,826,536 692,465
46 Swedish svenska sv 11.09 1,750,301 26,461,615 4,022,854
47 Latin Latina la 10.36 109,483 2,863,545 203,407
48 Dutch Nederlands nl 8.73 1,783,687 42,731,255 3,233,743
49 Kazakh қазақша kk 8.31 208,284 2,229,817 489,549
50 Cebuano Cebuano ceb 3.3 1,021,735 4,969,317 2,279,459
51 Waray-Waray Winaray war 3.12 1,073,723 5,427,838 2,311,865
52 Minangkabau Baso Minangkabau min 0.002 221,034 481,602 227,602


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 68 100 9 122 174 114 11 115 26 45 30 36 210 95 16 39 99 18 18 70 61 256 237 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.