For #IUday, Filippo Menczer presents research on online misinformation from the Center for Complex Networks and Systems Research, IU School of Informatics and Computing, and IU Network Science Institute. Watch the Facebook Live talk at https://www.facebook.com/fil.menczer/posts/10108970712372359

1. The spread of misinformation
in social media
Filippo Menczer
Center for Complex Networks and Systems Research
School of Informatics and Computing
Indiana University, Bloomington

3. 1. How misinformation spreads
2. Can the spread of misinformation be mitigated?

4. 1. How misinformation spreads
2. Can the spread of misinformation be mitigated?

5. 28 Aug
3 Sep
26 Aug
28 Aug
25 Aug 2014
18 Oct
21 Oct
24 Oct
23 Oct
3 Nov
4 Nov
10 Nov
22 Oct

6. September 2014

7. September 2014
1 March 2016

8. September 2014
1 March 2016

9. September 2014
1 March 2016

10. September 2014
1 March 2016

14. What is the role of online
social networks and social
media in fostering echo
chambers, filter bubbles,
segregation, polarization?

15. Two ingredients:
1. Social influence
2. Unfriending

16. Two ingredients:
1. Social influence
2. Unfriending

17. Segregation
Credibility
Number of
active
believers
Hoaxes & Community Structure

18. DO the best
ideas win?
m1
m2
m3
m4
m5
m6
m7
m8
m9
m1
m9
m3
m9
m5
m9
m7
m6
m1
m6
m3
m6
m5
m6
m7
1-
α{
• Spread among agents with
limited attention on social
network is sufficient to explain
meme virality
• More complicated explanations
based on intrinsic meme quality
are not necessary

19. Empirical calibration of
information load (high)
and individual attention
(low) leads to low
discrimination power
Information load (competition for attention)
individual
attention
LOW HIGH
HIGH
LOW
what if agents
favor quality?
P(m) ∝!(m)

20. Data source: Emergent.info
fake news just as likely to go viral

21. 1. How misinformation spreads
2. Can the spread of misinformation be mitigated?

22. osome.iuni.iu.edu
truthy.indiana.edu

25. grassroots
astroturf
Astroturf Detection

26. Real-time
analysis and
classification
Real-time query
(Twitter search
API)
Real-time feature
(>1K) extraction
~
About ~ seconds!
truthy.indiana.edu/botornot
CACM, July 2016

29. #brexit

30. #SB277

33. Thanks!
cnets.indiana.edu
iuni.iu.iedu
Marcella
Tambuscio