视觉经验塑造语义记忆的组织方式，盲人与正常人的概念导航模式不同。
Entropy in Semantic Memory Navigation in Blind and Sighted Individuals: The Effect of Visual Experience
- 用语义熵衡量概念检索的可预测性，比较盲人与视障者在具体/抽象概念上的差异
- 视障者对视觉显著的具体概念（如企鹅）语义熵更高，而普通人抽象概念熵更高
- 揭示视觉经验影响概念组织机制，适合认知科学与神经科学研究者阅读
具身认知理论强调感觉运动系统在知识获取与存储中的作用。先天失明群体为检验这一假设提供了关键实验场景，可用于评估概念建构是否依赖视觉经验。本研究通过属性列举任务，比较盲人与正常人对具体与抽象概念的语义记忆导航差异。计算了基于嵌入的自然语言处理指标——语义熵，用于衡量概念检索的可预测性。广义线性混合模型显示，两组存在明显差异：正常人对抽象概念的语义熵高于具体概念，但盲人无此趋势。相反，盲人对具有视觉显著性的具体概念（如企鹅）表现出更高的语义熵。结果表明，视觉经验在语义记忆的组织与动态导航中起关键作用。
原文摘要 · Abstract (English)
Embodied accounts of semantic memory highlight the role of sensorimotor systems in acquiring and storing knowledge. Congenitally blind populations offer a critical test bed for these assumptions, providing an opportunity to assess whether conceptual grounding requires visual experience. In this study, we assessed semantic memory navigation differences between blind and sighted individuals using a property listing task with concrete and abstract concepts. We computed semantic entropy, an embedding-based natural language processing metric that captures the predictability of retrieval. Generalized linear mixed models revealed distinct navigation patterns across groups: while sighted individuals showed higher entropy for abstract than concrete concepts, blind participants did not. Instead, blind individuals exhibited higher entropy for visually salient concrete concepts (e.g., penguin). These results underscore the role of visual experience in the organization and dynamic navigation of semantic memory.
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