*Call for Participation in Shared Task* **

Analysis of Persuasion Techniquesin Parliamentary Debates and Disinformation- and Propaganda-oriented Social Media

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Co-located with Slavic NLP 2025 http://bsnlp.cs.helsinki.fi/Workshop, at ACL in Vienna, Austria

bsnlp.cs.helsinki.fi/shared-task.html http://bsnlp.cs.helsinki.fi/shared-task.html

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TASK DESCRIPTION:

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The task focuses on detection and classification of Persuasion Techniques using data from 5 Slavic languages — Bulgarian, Polish, Croatian, Slovene and Russian — in two types of texts: (a) parliamentary debates on hotly-contested topics, and (b) social media posts, related to the spread of disinformation and propaganda. The task has two subtasks:

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Subtask 1: Detection — Given a text and a list of fragment offsets, determine for each fragment whether it contains one or more persuasion techniques, from a given taxonomy of persuasion techniques,

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Subtask 2: Classification —Given a text and a list of fragment offsets, determine for each fragment which persuasion techniques are employed therein.

We use a rich taxonomy with 25 persuasion techniques: Name-calling or labelling, Guilt by association, Casting doubt, Appeal to hypocrisy, Questioning the reputation, Flag waiving, Appeal to authority, Appeal to popularity, Appeal to fear and prejudice, Appeal to values, Strawman, Whataboutism, Red herring, Appeal to pity, Causal oversimplification, False dilemma or no choice, Consequential oversimplification, False equivalence, Slogans, Conversation killer, Appeal to time, Loaded language, Obfuscation-Intentional vagueness-confusion, Exaggeration or minimization, Repetition.

Subtask 1 is a binary classification task. Subtask 2 is a multi-class multi-label classification task. The text fragments correspond to paragraphs.

For information about training and test data, guidelines, and participation, please see theShared Task Home Page. http://bsnlp.cs.helsinki.fi/shared-task.html

IMPORTANT: Participants may join both subtasks or only one. It is not mandatory to submit responses for all languages. Up to 5 system responses per language per team may be submitted.

Important Dates

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Registration deadline: 26 April 2025

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Release of Testdata to registered participants: *29 April*2025

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Submission of system responses: 5 May 2023

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Results announced to participants: 8 May 2025

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Submission of shared task papers (optional): 18 May 2025

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*Questions and contact: bsnlp@cs.helsinki.fimailto:bsnlp@cs.helsinki.fi*