Beyond Surface Imitation: Contrastive Modeling for Reasoning Path Alignment in Multimodal In-Context Learning
作者: Mingbo Yang, Wenqiang Wang, Zhaolu Kang, Peng Chen, Yannan Chen, Sunshang Wang, Yan Xiao
分类: cs.AI
发布日期: 2026-09-09
💡 一句话要点
提出对比建模框架以解决多模态学习中的推理路径对齐问题
🎯 匹配领域: 支柱九:具身大模型 (Embodied Foundation Models)
关键词: 多模态学习 对比建模 推理路径 视觉问答 自我优化 响应条件检索 大语言模型
📋 核心要点
- 现有多模态ICL方法主要依赖表面模仿,难以有效对齐复杂输入的推理路径,限制了模型性能的提升。
- 本文提出了一种结合对比示范建模和自我优化能力的新框架,通过对比次优与更优响应,明确推理路径。
- 在三种多模态任务的实验中,所提框架在性能上持续提升,尤其在视觉问答任务中取得显著进展。
📝 摘要(中文)
在多模态大语言模型(MLLMs)中,情境学习(ICL)广泛应用并在多种任务中表现出色。然而,现有的多模态ICL方法往往依赖于表面模仿,导致模型难以与复杂输入的推理路径对齐。为了解决这一问题,本文提出了一种新的多模态ICL框架,结合对比示范建模与自我优化能力,通过对比次优响应与更优响应,明确推理路径,从而引导MLLM超越表面模仿。实验结果表明,该框架在多模态任务中显著提升了模型性能,尤其在视觉问答(VQA)任务上表现突出。
🔬 方法详解
问题定义:本文旨在解决现有多模态ICL方法在复杂任务中无法有效对齐推理路径的问题,导致模型性能受限。
核心思路:提出通过对比次优响应与更优响应,明确推理路径,从而引导模型超越表面模仿,提升响应质量。
技术框架:整体框架包括对比示范建模和响应条件检索机制,前者通过对比不同响应明确推理路径,后者选择与当前响应相关的示范以优化学习过程。
关键创新:最重要的创新在于对比建模的引入,使得推理路径更加明确,帮助模型理解如何进行有效的响应优化,区别于传统的表面模仿方法。
关键设计:设计了轻量级的对齐控制器来预测响应质量,并决定是否需要进一步优化,同时在示范选择中引入响应条件检索机制,以确保选择的示范与当前任务相关。
🖼️ 关键图片
📊 实验亮点
实验结果显示,所提框架在视觉问答(VQA)任务上取得了显著提升,相较于基线方法,性能提升幅度达到XX%,展示了对比建模在多模态学习中的有效性。
🎯 应用场景
该研究的潜在应用领域包括智能问答系统、图像理解与生成、以及多模态交互等。通过提升多模态学习模型的推理能力,能够在复杂场景中提供更准确的响应,具有重要的实际价值和未来影响。
📄 摘要(原文)
In-context learning (ICL) is widely used in multimodal large language models (MLLMs) and achieves strong performance across a wide range of multimodal tasks. However, existing multimodal ICL methods often rely on surface level imitation of in-context demonstrations, making it difficult for MLLMs to align their responses with the reasoning path required by the given multimodal input. This limitation becomes more pronounced in complex multimodal tasks, thereby restricting further improvements in MLLM performance. To address this issue, we propose a new multimodal ICL framework that combines contrastive demonstration modeling with the self-refinement capability of MLLMs. Specifically, our framework reformulates each demonstration by explicitly contrasting a suboptimal response with a better response under the same input, together with a reasoning path that reveals how the response should be refined. This contrastive formulation makes the reasoning path toward the desired response more explicit and guides the MLLM beyond superficial imitation. Furthermore, because effective refinement depends on the current response, we introduce a response-conditioned retrieval mechanism to select demonstrations whose reasoning paths are more relevant to the current response. In addition, we use a lightweight alignment controller to predict response quality and determine whether further refinement is needed. Experiments on three types of multimodal tasks show that the proposed framework consistently improves MLLM performance, with particularly notable gains on visual question answering (VQA).