@article{Lifelo2026, 
author = {Zita Lifelo and Jianguo Ding and Zongjie Wang and Feifei Shi and Huansheng Ning and Sahraoui Dhelim},
title = {Prompt-MAML: Model-Agnostic Meta-in-Context Learning for Major Depressive Disorder Classification},
year = {2026},
journal = {Tsinghua Science and Technology},
volume = {31},
number = {5},
pages = {2597-2610},
keywords = {large language model, multimodality, in-context learning, major depressive disorder detection, model-agnostic meta learning},
url = {https://www.sciopen.com/article/10.26599/TST.2025.9010116},
doi = {10.26599/TST.2025.9010116},
abstract = {The classification of major depressive disorders (MDDs) is a challenging task in clinical practice, especially in low-resource scenarios where generalization is essential for effective adaptation. Recent progress in meta-training large language models (LLMs) via in-context learning (ICL) offers promise for robust adaptation to unseen tasks without parameter updates. However, existing methods rely on multitask fine-tuning and do not fully exploit the optimization advantages of model-agnostic meta learning (MAML) techniques, limiting their generalization. This study proposes prompt-MAML, a novel method for meta-training LLMs that enhances multimodal ICL for classifying MDD tasks. The method integrates audio-textual features through a transformer-based cross-modal alignment module and incorporates bi-level optimization to learn generalizable model parameters that adapt well to unseen tasks. Extensive experiments demonstrate that prompt-MAML outperforms strong baseline models by an average improvement in macro-F1 of +4% on seen domains, +3% on unseen domains, and +3% in few-shot settings, demonstrating robustness and effectiveness in data-scarce and cross-domain clinical scenarios. Additionally, exploration depth is shown to play a key role in task performance, and further analysis of task complexity, modality, and optimiser configurations highlights critical design considerations for meta-training LLMs.}
}