Detecting Changes in Mental Health Status via Reddit Posts in Response to Global Negative Events

Zenan Chen, Judita Preiss, Peter A. Bath


Abstract
Detecting population-level mental health responses to global negative events through social media language remains understudied, despite its potential for public health surveillance. While pretrained language models (PLMs) have shown promise in mental health detection, their effectiveness in capturing event-driven collective psychological shifts – especially across diverse crisis contexts – is unclear. We present a prototype evaluation of three PLMs for identifying population mental health dynamics triggered by real-world negative events. We introduce two novel datasets specifically designed for this task. Our findings suggest that DistilBERT is better suited to the noisier global negative events data, while MentalRoBERTa shows the validity of the method on the Covid-19 tidier data. SHAP interpretability analysis of 500 randomly sampled posts revealed that mental-health related vocabulary (anxiety, depression, worthless) emerged as the most influential linguistic markers for mental health classification.
Anthology ID:
2025.ranlp-1.27
Volume:
Proceedings of the 15th International Conference on Recent Advances in Natural Language Processing - Natural Language Processing in the Generative AI Era
Month:
September
Year:
2025
Address:
Varna, Bulgaria
Editors:
Galia Angelova, Maria Kunilovskaya, Marie Escribe, Ruslan Mitkov
Venue:
RANLP
SIG:
Publisher:
INCOMA Ltd., Shoumen, Bulgaria
Note:
Pages:
227–233
Language:
URL:
https://aclanthology.org/2025.ranlp-1.27/
DOI:
Bibkey:
Cite (ACL):
Zenan Chen, Judita Preiss, and Peter A. Bath. 2025. Detecting Changes in Mental Health Status via Reddit Posts in Response to Global Negative Events. In Proceedings of the 15th International Conference on Recent Advances in Natural Language Processing - Natural Language Processing in the Generative AI Era, pages 227–233, Varna, Bulgaria. INCOMA Ltd., Shoumen, Bulgaria.
Cite (Informal):
Detecting Changes in Mental Health Status via Reddit Posts in Response to Global Negative Events (Chen et al., RANLP 2025)
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PDF:
https://aclanthology.org/2025.ranlp-1.27.pdf