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| | 雅虎小世界实验（Yahoo! Research Small World Experiment ）一直在进行一项实验，每个拥有Facebook账户的人都可以参与其中。根据研究页面，这项研究有可能解决仍未解决的六度分隔理论。 | | 雅虎小世界实验（Yahoo! Research Small World Experiment ）一直在进行一项实验，每个拥有Facebook账户的人都可以参与其中。根据研究页面，这项研究有可能解决仍未解决的六度分隔理论。 |
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| − | Facebook的数据团队在2011年11月发布了两篇论文，其中记录了在研究时的所有Facebook用户中（7.21亿用户，690亿条友谊链接）<ref>{{cite arXiv|eprint=1111.4570|title=Four Degrees of Separation|last=Backstrom|first=Lars |author2=Boldi, Paolo |author3=Rosa, Marco |author4=Ugander, Johan |author5=Vigna, Sebastiano|date=2011-11-19|class=cs.SI}}</ref> ，平均距离为4.74。<ref name="SDS-T-01">{{cite news|url=https://www.telegraph.co.uk/technology/facebook/8906693/Facebook-cuts-six-degrees-of-separation-to-four.html|title=Facebook cuts six degrees of separation to four|work=Telegraph|accessdate=7 May 2012|first=Emma|last=Barnett|date=22 November 2011}}</ref><ref name="facebook2016" /> 研究还发现，99.91%的Facebook用户是相互联系的，形成了一个大的连接部分<ref>{{cite arXiv|eprint=1111.4570|title=Four Degrees of Separation|last=Backstrom|first=Lars |author2=Boldi, Paolo |author3=Rosa, Marco |author4=Ugander, Johan |author5=Vigna, Sebastiano|date=2011-11-19|class=cs.SI}}</ref> <ref>{{cite arXiv|eprint=1111.4503|title=The Anatomy of the Facebook Social Graph|last=Ugander|first=Johan|author2=Karrer, Brian |author3=Backstrom, Lars |author4= Marlow, Cameron |class=cs.SI|year=2011}}</ref>。据 Facebook 报道，2016年2月，这个数字降到了4.57，当时 Facebook 拥有16亿用户(约占世界人口的22%)。
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| − | Facebook's data team released two papers in November 2011 which document that amongst all Facebook users at the time of research (721 million users with 69 billion friendship links) there is an average distance of 4.74.<ref name="SDS-T-01">{{cite news|url=https://www.telegraph.co.uk/technology/facebook/8906693/Facebook-cuts-six-degrees-of-separation-to-four.html|title=Facebook cuts six degrees of separation to four|work=Telegraph|accessdate=7 May 2012|first=Emma|last=Barnett|date=22 November 2011}}</ref><ref name="facebook2016" /> Probabilistic algorithms were applied on statistical metadata to verify the accuracy of the measurements.<ref>{{cite arXiv|eprint=1111.4570|title=Four Degrees of Separation|last=Backstrom|first=Lars |author2=Boldi, Paolo |author3=Rosa, Marco |author4=Ugander, Johan |author5=Vigna, Sebastiano|date=2011-11-19|class=cs.SI}}</ref> It was also found that 99.91% of Facebook users were interconnected, forming a large connected component.<ref>{{cite arXiv|eprint=1111.4503|title=The Anatomy of the Facebook Social Graph|last=Ugander|first=Johan|author2=Karrer, Brian |author3=Backstrom, Lars |author4= Marlow, Cameron |class=cs.SI|year=2011}}</ref>
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| − | !Year!! colspan="2" |Distance
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| − | ! 一年！Colspan="“2”" |距离
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| − | | + | ! Year !! colspan="2"|Distance |
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| − | | + | | 2008 || {{bartable|5.28||20}} |
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| − | |2008||{{bartable|5.28||20}} | |
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| − | | + | | 2011 || {{bartable|4.74||20}} |
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| − | | + | | 2016 || {{bartable|4.57||20}} |
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| − | | + | | colspan="3"|Distances as reported in Feb 2016 <ref name="facebook2016" /><ref>{{cite news|title=Facebook says there are only 3.57 degrees of separation|newspaper=The Telegraph|date=4 February 2016|url=https://www.telegraph.co.uk/technology/2016/02/04/facebook-says-there-are-actually-357-degrees-of-separation/ |archive-url=https://ghostarchive.org/archive/20220112/https://www.telegraph.co.uk/technology/2016/02/04/facebook-says-there-are-actually-357-degrees-of-separation/ |archive-date=2022-01-12 |url-access=subscription |url-status=live|access-date=4 February 2016|last1=Titcomb|first1=James}}{{cbignore}}</ref> |
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| − | |2011||{{bartable|4.74||20}}
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| − | | colspan="3" |Distances as reported in Feb 2016 | |
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| − | | colspan="“3”" |rises as reported in Feb 2016
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| − | |2016||{{bartable|4.57||20}} | |
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| | + | Facebook的数据团队在2011年11月发布了两篇论文，其中记录了在研究时的所有Facebook用户中（7.21亿用户，690亿条友谊链接）<ref>{{cite arXiv|eprint=1111.4570|title=Four Degrees of Separation|last=Backstrom|first=Lars |author2=Boldi, Paolo |author3=Rosa, Marco |author4=Ugander, Johan |author5=Vigna, Sebastiano|date=2011-11-19|class=cs.SI}}</ref> ，平均距离为4.74。<ref name="SDS-T-01">{{cite news|url=https://www.telegraph.co.uk/technology/facebook/8906693/Facebook-cuts-six-degrees-of-separation-to-four.html|title=Facebook cuts six degrees of separation to four|work=Telegraph|accessdate=7 May 2012|first=Emma|last=Barnett|date=22 November 2011}}</ref><ref name="facebook2016" /> 研究还发现，99.91%的Facebook用户是相互联系的，形成了一个大的连接部分<ref>{{cite arXiv|eprint=1111.4570|title=Four Degrees of Separation|last=Backstrom|first=Lars |author2=Boldi, Paolo |author3=Rosa, Marco |author4=Ugander, Johan |author5=Vigna, Sebastiano|date=2011-11-19|class=cs.SI}}</ref> <ref>{{cite arXiv|eprint=1111.4503|title=The Anatomy of the Facebook Social Graph|last=Ugander|first=Johan|author2=Karrer, Brian |author3=Backstrom, Lars |author4= Marlow, Cameron |class=cs.SI|year=2011}}</ref>。据 Facebook 报道，2016年2月，这个数字降到了4.57，当时 Facebook 拥有16亿用户(约占世界人口的22%)。 |
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