TY - CONF A1 - Alam, Firoj A1 - Struß, Julia Maria A1 - Chakraborty, Tanmoy A1 - Dietze, Stefan A1 - Hafid, Salim A1 - Korre, Katerina A1 - Muti, Arianna A1 - Nakov, Preslav A1 - Ruggeri, Federico A1 - Schellhammer, Sebastian A1 - Setty, Vinay A1 - Sundriyal, Megha A1 - Todorov, Konstantin A1 - Venktesh, V. A2 - Hauff, Claudia A2 - Macdonald, Craig A2 - Jannach, Dietmar A2 - Nardini, Franco Maria A2 - Pinelli, Fabio A2 - Silvestri, Fabrizio A2 - Tonellotto, Nicola T1 - The CLEF-2025 CheckThat! Lab T2 - Advances in Information Retrieval : 47th European Conference on Information Retrieval, ECIR 2025, Lucca, Italy, April 6–10, 2025, Proceedings, Part V N2 - The CheckThat! lab aims to advance the development of innovative technologies designed to identify and to counteract online disinformation and manipulation efforts across various languages and platforms. The first five editions of the CheckThat! lab focused on the main tasks of the information verification pipeline: check-worthiness, evidence retrieval and pairing, and verification. Since the 2023 edition, the lab has broadened the focus and addressed new problems on auxiliary tasks supporting research and decision-making during the verification process. In the 2025 edition of the lab, we consider tasks at the core of the verification pipeline again as well as auxiliary tasks: Task 1 is on identification of subjectivity (a follow up of the CheckThat! 2024 edition), Task 2 is on claim normalization, Task 3 addresses fact-checking numerical claims, and Task 4 focuses on scientific web discourse processing. These tasks represent challenging classification and retrieval problems at the document and at the span level, including multilingual settings. KW - Desinformation KW - Fehlinformation KW - Information Retrieval Y1 - 2025 UR - https://opus4.kobv.de/opus4-fhpotsdam/frontdoor/index/index/docId/3704 SN - 978-3-031-88720-8 SN - 0302-9743 SP - 467 EP - 478 PB - Springer International Publishing CY - Cham ER -