[Submitted on 18 Jul 2026]
Title:Modality Discrepancy Transformer for Ambivalence and Hesitancy Recognition
View a PDF of the paper titled Modality Discrepancy Transformer for Ambivalence and Hesitancy Recognition, by Shiyu Luo and Yu Wang and Jiawen Huang and Zhaoxiang Xiao and Chenxi Huang and Qi Zhang and Bin Liu
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Abstract:Ambivalence and hesitancy (A/H) are affective states in which individuals express contradictory signals across facial, vocal, and linguistic channels. Automatically recognising A/H in clinical videos requires detecting cross-modal disagreement -- the signal that standard fusion methods suppress. Based on the conflict-aware multimodal fusion framework of Bekhouche et al., we present the Modality Discrepancy Transformer (MDT). MDT enriches the original 6-token design to a 9-token representation comprising three modality embeddings, three absolute-difference features, and three Hadamard-product discrepancy features learned through linear projections. These nine tokens undergo Transformer self-attention, with FiLM-based text-conditioned modulation and LoRA fine-tuning as core architectural components. A text-guided late fusion branch blends a text-only auxiliary head with the full multimodal output at inference. On the BAH dataset from the 3rd ABAW Challenge, MDT achieves 0.7408 Macro F1 on the labelled test split and 0.7368 on the private leaderboard, outperforming the strongest published baseline by over 10 points while training in under 20 minutes on a single GPU.
Comments: 10 pages
Subjects:
Computation and Language (cs.CL); Computer Vision and Pattern Recognition (cs.CV)
Cite as: arXiv:2609.19148 [cs.CL]
(or arXiv:2609.19148v1 [cs.CL] for this version)
https://doi.org/10.48550/arXiv.2609.19148
arXiv-issued DOI via DataCite
Submission history
From: Shiyu Luo [view email] [v1] Sat, 18 Jul 2026 03:40:24 UTC (388 KB)
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