This research tackles the challenge of integrating heterogeneous data for specific behavior recognition within the domain of Pain Recognition, presenting a novel methodology that harmonizes statistical correlations with a human-centered approach. By leveraging a diverse range of deep learning architectures, we highlight the adaptability and efficacy of our approach in improving model performance across various complex scenarios. The novelty of our methodology is the strategic incorporation of statistical relevance weights and the segmentation of modalities from a human-centric perspective, enhancing model precision and providing a explainable analysis of multimodal data. This study surpasses traditional modality fusion techniques by underscoring the role of data diversity and customized modality segmentation in enhancing pain behavior analysis. Introducing a framework that matches each modality with an suited classifier, based on the statistical significance, signals a move towards customized and accurate multimodal fusion strategies. Our contributions extend beyond the field of Pain Recognition by delivering new insights into modality fusion and human-centered computing applications, contributing towards explainable AI and bolstering patient-centric healthcare interventions. Thus, we bridge a significant void in the effective and interpretable fusion of multimodal data, establishing a novel standard for forthcoming inquiries in pain behavior recognition and allied fields.