Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/8298
Title: Overview of the CLEF-2021 CheckThat! Lab on Detecting Check-Worthy Claims, Previously Fact-Checked Claims, and Fake News
Authors: Nakov, Preslav
Martino, Giovanni Da San
Elsayed, Tamer
Barron-Cedeno, Alberto
Miguez, Ruben
Shaar, Shaden
Kartal, Yavuz Selim
Keywords: Fact-Checking
Disinformation
Misinformation
Check-Worthiness Estimation
Verified Claim Retrieval
Fake News Detection
COVID-19
Publisher: Springer international Publishing Ag
Series/Report no.: Lecture Notes in Computer Science
Abstract: We describe the fourth edition of the CheckThat! Lab, part of the 2021 Conference and Labs of the Evaluation Forum (CLEF). The lab evaluates technology supporting tasks related to factuality, and covers Arabic, Bulgarian, English, Spanish, and Turkish. Task 1 asks to predict which posts in a Twitter stream are worth fact-checking, focusing on COVID-19 and politics (in all five languages). Task 2 asks to determine whether a claim in a tweet can be verified using a set of previously fact-checked claims (in Arabic and English). Task 3 asks to predict the veracity of a news article and its topical domain (in English). The evaluation is based on mean average precision or precision at rank k for the ranking tasks, and macro-F1 for the classification tasks. This was the most popular CLEF-2021 lab in terms of team registrations: 132 teams. Nearly one-third of them participated: 15, 5, and 25 teams submitted official runs for tasks 1, 2, and 3, respectively.
Description: Kartal, Yavuz Selim/0000-0002-2146-2680; Mansour, Watheq/0000-0002-9463-595X; Mandl, Thomas/0000-0002-8398-9699; Hasanain, Maram/0000-0002-7466-178X; Struss, Julia Maria/0000-0001-9133-4978; Haouari, Fatima/0000-0003-4842-2467; Shahi, Gautam Kishore/0000-0001-6168-0132
URI: https://doi.org/10.1007/978-3-030-85251-1_19
ISBN: 9783030852504
9783030852511
ISSN: 0302-9743
1611-3349
Appears in Collections:Bilgisayar Mühendisliği Bölümü / Department of Computer Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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