AINeutralarXiv – CS AI · 7h ago5/10
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LinguIUTics at PsyDefDetect: Iterative Imbalance-Aware Fine-tuning of Qwen3-8B for Psychological Defense Mechanism Classification
The LinguIUTics team achieved 4th place in the PsyDefDetect 2026 shared task by fine-tuning Qwen3-8B to classify psychological defense mechanisms in clinical conversational text, reaching a macro F1-score of 0.3917 and substantially improving performance on rare classes through specialized techniques including minority-class augmentation and ensemble methods.