Graph Integrated Multimodal Concept Bottleneck Model

• URL: http://arxiv.org/abs/2510.00701v1
• Date: Wed, 01 Oct 2025 09:18:38 GMT
• Title: Graph Integrated Multimodal Concept Bottleneck Model
• Authors: Jiakai Lin, Jinchang Zhang, Guoyu Lu,
• Abstract summary: MoE-SGT is a framework that augments Concept Bottleneck Models (CBMs) with a structure injecting Graph Transformer and a Mixture of Experts (MoE) module.<n>We construct answer-concept and answer-question graphs for multimodal inputs to explicitly model the structured relationships among concepts.<n>MoE-SGT achieves higher accuracy than other concept bottleneck networks on multiple datasets.
• Score: 24.726638033402747
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: With growing demand for interpretability in deep learning, especially in high stakes domains, Concept Bottleneck Models (CBMs) address this by inserting human understandable concepts into the prediction pipeline, but they are generally single modal and ignore structured concept relationships. To overcome these limitations, we present MoE-SGT, a reasoning driven framework that augments CBMs with a structure injecting Graph Transformer and a Mixture of Experts (MoE) module. We construct answer-concept and answer-question graphs for multimodal inputs to explicitly model the structured relationships among concepts. Subsequently, we integrate Graph Transformer to capture multi level dependencies, addressing the limitations of traditional Concept Bottleneck Models in modeling concept interactions. However, it still encounters bottlenecks in adapting to complex concept patterns. Therefore, we replace the feed forward layers with a Mixture of Experts (MoE) module, enabling the model to have greater capacity in learning diverse concept relationships while dynamically allocating reasoning tasks to different sub experts, thereby significantly enhancing the model's adaptability to complex concept reasoning. MoE-SGT achieves higher accuracy than other concept bottleneck networks on multiple datasets by modeling structured relationships among concepts and utilizing a dynamic expert selection mechanism.

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