tambusciodiunitoit Factchecking and viral hoaxes a model of misinformation spread in social networks RDSM15 WWW15 Le avventure di Pinocchio Enrico Mazzanti Firenze 1883 The Spread of Online Misinformation ID: 301001
Download Presentation The PPT/PDF document "Marcella Tambuscio" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Slide1
Marcella Tambuscio(tambuscio@di.unito.it)
Fact-checking and viral hoaxes: a model of misinformation spread in social networks
#RDSM15 - WWW15
Le avventure di Pinocchio
Enrico Mazzanti (Firenze, 1883)Slide2Slide3
The Spread of Online Misinformation
source: California Dept. of Public HealthSlide4
Sisyphus -Tiziano (1548)Slide5
How do hoaxes and facts compete?Slide6
Epidemic models
Slide7
Our model (1)
SPREADINGβ spreading rateα gullibility
Slide8
Our model (2)
VERIFYING(probability of fact-check)Slide9
Our model (3)
FORGETTINGSlide10
Comparison with SISSlide11
Dynamics (simulation results)Slide12
Dynamics (simulations results)Slide13
Mean-field
analysisSlide14
“more gullible, less fact-check”
MF equationsSlide15
A tale of two communities
GULLIBLESKEPTIChigher
α
smaller
α
SIZE:
nodes in gullible community (0 < t < N)
SEGREGATION:
fraction of edges within community (0.5 < s < 1) Slide16
α = 0.85
GULLIBLE
SKEPTIC
α = 0.4
Segregation
size t
segregation s
num believers at equilibriumSlide17
Vaccines
hoaxSlide18
Chemtrails
hoaxSlide19
Summary
Threshold on verifying probability: provides an idea of how many fact-checkers are needed to guarantee the removal of the hoax.Crucial role of size and segregation of gullible communities in the diffusion of misinformation: reducing them, the hoax spread can be cointained.Next: looking at role of forgetting and fluctuationsSlide20
THANK YOU!
University of Turin arcs.di.unito.itIndiana University cnets.indiana.edu