Smart textiles enable embodied interaction by integrating sensing, actuation, and computation into textile-based systems. In culturally oriented design contexts, however, many existing smart textile applications emphasize technical demonstration or surface-level visual adaptation, providing limited methodological support for translating cultural content into systematically evaluable interaction experiences. To address this limitation, this study develops and empirically examines a structured design-and-evaluation framework for integrating ethnic art elements into smart textile interaction design, with a focus on cultural expression and user experience. The framework consists of three sequential layers: cultural decomposition, experience mapping, and adaptive optimization. Ethnic art elements are first decomposed into explicit, design-relevant parameters across visual, material, and narrative dimensions. These parameters are then translated to embodied interaction behaviors through constrained and parameterized rules, enabling cultural attributes to be expressed via tactile, temporal, and material-based interactions. A user-feedback-driven optimization mechanism further refines interaction parameters to accommodate individual differences in perception and interpretation within predefined bounds. To examine the effectiveness of the proposed framework-guided cultural interaction strategy, a smart textile prototype inspired by Miao embroidery was designed and fabricated using integrated textile sensors and actuators. A mixedmethod user study (N = 60) with controlled comparison conditions evaluated cultural narrative recognition and experience satisfaction. Results show that the framework-guided interactive design yields significantly higher cultural narrative recognition accuracy (F(2,57) = 92.51, p < .001, η² = .76) and experience satisfaction (F(2,57) = 87.66, p < .001, η² = .75) compared to static cultural and non-cultural interactive baselines. This study demonstrates a reproducible, engineering-oriented approach for embedding cultural expression into smart textile interaction systems through the integrated use of cultural analysis and interaction design, rather than isolated visual or technical augmentation.

smart textiles, interaction design, cultural expression, ethnic art, user experience