Editing Wikipedia (section)

==== Coverage of topics and selection bias ====
Research conducted by Mark Graham of the [[Oxford Internet Institute]] in 2009 indicated that the geographic distribution of article topics is highly uneven. Africa is the most underrepresented.<ref>{{cite web |last1=Graham |first1=Mark |title=Mapping the Geographies of Wikipedia Content |url=https://zerogeography.net/post/144973716228/mapping-the-geographies-of-wikipedia-content |website=Zerogeography |archive-url=https://web.archive.org/web/20161002051150/https://zerogeography.net/post/144973716228/mapping-the-geographies-of-wikipedia-content |archive-date=October 2, 2016}}</ref> Across 30 language editions of Wikipedia, historical articles and sections are generally Eurocentric and focused on recent events.<ref>{{cite book |last = Strohmaier |first = Markus |date = March 6, 2017 |title = Multilingual historical narratives on Wikipedia |chapter = KAT50 Society, Culture |doi = 10.7802/1411 |quote = Wikipedia narratives about national histories (i) are skewed towards more recent events (recency bias) and (ii) are distributed unevenly across the continents with significant focus on the history of European countries (Eurocentric bias). |publisher = GESIS Data Archive}}</ref>

An editorial in ''[[The Guardian]]'' in 2014 claimed that more effort went into providing references for [[list of pornographic performers by decade|a list of female porn actors]] than a [[list of women writers]].<ref name=GuardianAugust2014>{{cite news |title=The Guardian view on Wikipedia: evolving truth |url=https://www.theguardian.com/commentisfree/2014/aug/07/guardian-view-wikipedia-evolving-truth |work=[[The Guardian]] |date=August 7, 2014 |archive-url=https://web.archive.org/web/20161112212758/https://www.theguardian.com/commentisfree/2014/aug/07/guardian-view-wikipedia-evolving-truth |archive-date=November 12, 2016 |url-status=live}}</ref> Data has also shown that Africa-related material often faces omission; a knowledge gap that a July 2018 Wikimedia conference in [[Cape Town]] sought to address.<ref name="memeb"/>