information propagation in microblogging sites

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IR11 | Gothenburg Propagation paths of Information in Social Network Sites SIGSNA research project Luca Rossi – University of Urbino “Carlo Bo” [email protected]

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Presentation done at the IR11 Conference, Gothenburg Sweden.

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Page 1: Information propagation in Microblogging Sites

IR11 | Gothenburg

Propagation paths of Information in Social Network Sites

SIGSNA research projectLuca Rossi – University of Urbino “Carlo Bo”[email protected]

Page 2: Information propagation in Microblogging Sites

IR11 | Gothenburg

Page 3: Information propagation in Microblogging Sites

IR11 | Gothenburg

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IR11 | Gothenburg

What is propagation in Friendfeed?

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IR11 | Gothenburg

data

All public entries (post and related comments)

(Sept. 6 –Sept. 19 2009) ≃ 10.500.000 posts 500.000 likes. ≃ 450.000 users. ≃ 15.000.000 di archi (subs).≃

Page 6: Information propagation in Microblogging Sites

IR11 | Gothenburg

Data

196.350 Italian posts

Language Fidelity Index: Number of Posts in a Language / Number of Posts of users with an entry in that language.

Page 7: Information propagation in Microblogging Sites

IR11 | Gothenburg

case study: propagation

Mike Bongiorno (famous Italian TV host) died on Sept. 8 2010. The news appears in Friendfeed at 01.57 PM:- First entry 130 comments- All entries 585 comments

Page 8: Information propagation in Microblogging Sites

IR11 | Gothenburg

Page 9: Information propagation in Microblogging Sites

IR11 | Gothenburg

Using timestamps and network of followers we have been able to track the propagation paths identifying major hubs.

Page 10: Information propagation in Microblogging Sites

IR11 | Gothenburg

Long propagation chains No propagation

Short propagation chains

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IR11 | Gothenburg

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IR11 | Gothenburg

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Explicit news sharing is followed by chatting and discussion. This kind of activity contribute to news propagation

”Bye Mike! We’re missing you!Bye granpa Mike!Mike, you’ve been a milestone of our TV

“- Explicit news propagation.- Implicit news propagation.- Mourning ritual of the networked public.

Page 15: Information propagation in Microblogging Sites

IR11 | Gothenburg

tec nettec net real netreal net

edges14,946,610

161,603

followers 44 13

Some connections are more connections than others

When a connection is not enough.

Page 16: Information propagation in Microblogging Sites

IR11 | Gothenburg

First entry has the highest informative function

Most commented entry is a long and articulated discussion

Page 17: Information propagation in Microblogging Sites

IR11 | Gothenburg

Mass media system 2.0 ?

Friendfeed Major Italian Newspapers(Il Corriere della Sera, La Repubblica)

Page 18: Information propagation in Microblogging Sites

IR11 | Gothenburg

Mass media system 2.0 ?

When the news hit the Friendfeed network only SkyTg24 was broadcasting it. The selection code is up to the end user and he decides whenever a specific information is informative.

Page 19: Information propagation in Microblogging Sites

IR11 | Gothenburg

Mass media system 2.0 ?

Is the evolution of news/chat that we have detected similar to couple news/reportage?

Page 20: Information propagation in Microblogging Sites

IR11 | Gothenburg

More info, papers and data:http://larica.uniurb.it/sigsna

SIGSNA is a joint research project with the department of Computer Science of the University of Bologna (Dr. Matteo Magnani) and it is partially founded by Telecom Italia.