3295 2023 eng 251 275 conferenceobject Springer International Publishing Cham 1 -- -- -- We describe the sixth edition of the CheckThat! lab, part of the 2023 Conference and Labs of the Evaluation Forum (CLEF). The five previous editions of CheckThat! focused on the main tasks of the information verification pipeline: check-worthiness, verifying whether a claim was fact-checked before, supporting evidence retrieval, and claim verification. In this sixth edition, we zoom into some new problems and for the first time we offer five tasks in seven languages: Arabic, Dutch, English, German, Italian, Spanish, and Turkish. Task 1 asks to determine whether an item - text or text plus image- is check-worthy. Task 2 aims to predict whether a sentence from a news article is subjective or not. Task 3 asks to assess the political bias of the news at the article and at the media outlet level. Task 4 focuses on the factuality of reporting of news media. Finally, Task 5 looks at identifying authorities in Twitter that could help verify a given target claim. For a second year, CheckThat! was the most popular lab at CLEF-2023 in terms of team registrations: 127 teams. About one-third of them (a total of 37) actually participated. Experimental IR Meets Multilinguality, Multimodality, and Interaction 10.1007/978-3-031-42448-9_20 978-3-031-42448-9 1611-3349 2023-12-12T12:34:49+00:00 sword hisres Keine öffentliche Lizenz - es gilt das deutsche Urheberrecht Alberto Barrón-Cedeño Firoj Alam Andrea Galassi Giovanni Da San Martino Preslav Nakov Tamer Elsayed Dilshod Azizov Tommaso Caselli Gullal S. Cheema Fatima Haouari Maram Hasanain Mucahid Kutlu Chengkai Li Federico Ruggeri Julia Maria Struß Wajdi Zaghouani deu swd Desinformation deu swd Fehlinformation deu swd COVID-19 Bibliotheks- und Informationswissenschaften FB5 Informationswissenschaften Publikationen des FB Informationswissenschaften Import Fachhochschule Potsdam