Cross-Platform Generalisation Failure in Mental Health Natural Language Processing: A Five-Axis Fairness Audit of Transformer Models on Social Media

arXiv:2608.26138 · cs.CL, cs.LG · Submitted 2026-06-25 · Read on arXiv

cs.CL, cs.LG

Submitted: 2026-06-25

Updated: 2026-06-25

Comments: 15 pages, 24 figures, 10 tables. Submitted to IEEE Transactions on Neural Networks and Learning Systems

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• AUC — 4× in this paper · explained in 2 episodes
• Calibration — 3× in this paper · explained in 7 episodes
• Transformer — 2× in this paper · explained in 2 episodes
• Transformer Models — 2× in this paper · explained in 2 episodes
• Calibration Failure — 1× in this paper · explained in 2 episodes
• Cross-Platform Fairness Evaluation — 1× in this paper
• Failure Modes — 1× in this paper · explained in 3 episodes
• Fine-Tuning — 1× in this paper · explained in 5 episodes

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