MeVer team tackling Corona virus and 5G conspiracy using ensemble classification based on BERT
1. MeVer team tackling Corona virus and 5G conspiracy
using ensemble classification based on BERT
Olga Papadopoulou Giorgos Kordopatis-Zilos Symeon Papadopoulos
FakeNews: Corona virus and 5G conspiracy
3. Proposed Approach
CL2
CL1
CLN
5G and other
conspiracy
samples
No
conspiracy
Random
sampling
Step 1 Step 2
Majority
vote
Final
Predictions
CLf1
CLf2
No conspiracy detections
Conspiracy
detections
CLf1 = CLf2 = 1
1: 5G Conspiracy
2: Other conspiracy
3: Non-Conspiracy
1: 5G Conspiracy
2: Other conspiracy
Yes
No
5G
Other
All
samples
... Σ(C𝐿i) >
𝑁
2
Yes
No
1: Conspiracy
0: Non-conspiracy
• Sub-sample Non-conspiracy class
• Binary classification
• Majority voting
4. Results
Method MCC
Three-class BERT 0,42
Proposed approach 0,81
Our proposed approach achieved a score of 0.413 in terms of
MCC on the provided testing set of unseen tweets.
5. Thank you for your attention!
With the support of:
Get in touch:
Olga Papadopoulou: olgapapa@iti.gr / @olgpapa
MeVer team:
https://mever.iti.gr/web/ / @meverteam
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Questions ?
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Editor's Notes
Thank you very much for your attention. If you have any questions or comments, please don't hesitate to contact me or our team via email or through Twitter. Also, you may find code in GitHub for the evaluation and reproduction of the experimental results. Thank you.