====================== Call for Participation ====================== CLPsych 2026 Shared Task: Capturing and Characterizing Mental Health Changes through Social Media Timeline Dynamics, 📍 ACL 2026 in San Diego, USA (July 2-7 2026)
Overview: The 2026 shared task further advances work from previous years tasks by integrating dynamic mental health modeling, emphasizing the identification of key self-state elements leading up to mental state changes over time. Participants will analyze temporally ordered sequences of social media posts to characterize detailed psychological processes, key changes, as well as the interplay of such self-state processes leading up to the changes. Grounded in the MIND framework that conceptualizes self-states as combinations of Affect, Behavior, Cognition, and Desire (ABCD) components, it aims to further explore the fine-grained elements contributing to changes. The core objective of the shared task is to develop computational models that can identify adaptive and maladaptive self-state dimensions as well as changes over time across social media timelines aiming to characterize and summarize self-state sequences leading to such changes. Task description: Participants will develop systems that emulate a structured human annotation process to model mental health dynamics over time: * Predict adaptive and maladaptive ABCD element combinations for each individual post. * Identify moments of change in mental health social media trajectories using longitudinal signals. * Generate concise, interpretable self-state summaries leveraging the identified ABCD elements and contextual information leading up to changes in the user timeline. Registration: * One team registration<https://docs.google.com/forms/d/e/1FAIpQLSdKp0JeE9CfBd59gFGF9YePKEFC6JXmKC8wd383syoGNtX7fw/viewform> form * One individual registration form<https://docs.google.com/forms/d/e/1FAIpQLSftD9EbFFHMW_canwvXBYk87va6snnkpX9CglQl6GhAO1aDjQ/viewform> per team member Researchers seeking collaborators are encouraged to contact the organizers. Website: https://clpsych.org/shared-task/ Important dates: * Registration deadline (Feb 15) * Receiving guidelines on accessing sample data (Mar 1) * Receiving instructions on the task and training data (Mar 11) * System submissions on test set (Apr 18) * Shared Task Paper submissions (May 1) * Camera-ready papers due (May 15) Short Papers (one per team) up to 4 pages - with extra pages for references, limitations, ethics and appendices. Contact: [email protected]<mailto:[email protected]>, or any of the organizers directly.
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