Negative voices J Kleinfeld. Univ of alaska. since 2001 Milgram's main drawbacks No theoretical model Experiment results not very convincing low percentage of completed chains small sampling dataset in the human society 彐 TAH TNOC Need more theoretical modeling and more experimental supporting 彐TAa彐d
Negative voices J. Kleinfeld, Univ. of Alaska, since 2001 Milgram’s main drawbacks •No theoretical model •Experiment results not very convincing low percentage of completed chains small sampling dataset in the human society …… Need more theoretical modeling and more experimental supporting
Watts revisit in 2001 In columbia univ. with website and emails httpsmallworldcolumbia.edu Targets: 18 persons from 13 countries Participants: >60k volunteers from 166 countries 384 chains completed with average 5-7 hop of emails DISNEYLAND iT'S A SMALL WORLD” GAME
Watts’ revisit in 2001 • In Columbia Univ., with website and emails • http://smallworld.columbia.edu • Targets: 18 persons from 13 countries • Participants: >60k volunteers from 166 countries • 384 chains completed with average 5~7 hop of emails
Microsoft research's revisit in 2008 E Horvitz and his colleague at Ms Redmond proved with 255 billion messages in 30 billion conversations among 240 million persons during June 2006 even on world wide web. on a planetary-scale the oft- six degrees of p9Qoo00p s ooo cited report that people are separated by“sl separation, and find that the average path length among Messenger users is 6.6 88°888
Microsoft research’s revisit in 2008 even on world wide web, on a planetary-scale the oftcited report that people are separated by “six degrees of separation” and find that the average path length among Messenger users is 6.6 E. Horvitz and his colleague at MS Redmond proved with 255 billion messages in 30 billion conversations among 240 million persons during June 2006
Facebook: 4 degrees separation 2011/11/22 <Digital Life> Facebook: 6 degrees of separation? More like 4 22 Facebook: 6 degrees of separation? More ike 4 facebook Face k helps y ou the people in y e
Facebook: 4 degrees separation • 2011/11/22 <Digital Life> • Facebook: 6 degrees of separation? More like 4
More verifications Even by an undergraduate student in National University of Singapore in 2000-2001
More verifications …… Even by an undergraduate student in National University of Singapore in 2000-2001