让AI读懂学生叙事中的隐性文化资本,提升教育公平洞察力
AWARE, Beyond Sentence Boundaries: A Contextual Transformer Framework for Identifying Cultural Capital in STEM Narratives
- 通过领域、上下文和主题共现三重感知增强模型理解力
- 在多标签分类上比基线高2.1个百分点,全主题表现更优
- 适合做教育叙事分析、文化资本研究的学者与实践者
识别学生反思中体现的文化资本(CC)主题,有助于构建更公平的学习环境。但诸如抱负目标或家庭支持等主题常嵌入叙事中,而非以关键词形式出现,导致标准NLP模型因孤立处理句子而难以捕捉。其根本问题在于模型缺乏对特定领域语言与叙述上下文的敏感度。为此,我们提出AWARE框架,系统性提升变压器模型对此类复杂任务的认知能力。该框架包含三个核心组件:1)领域感知,适配学生反思的语言风格;2)上下文感知,生成考虑全文语境的句子嵌入;3)类别重叠感知,采用多标签策略识别单句中主题共存现象。实验表明,通过显式增强模型对输入特性的认知,AWARE在宏平均F1上比强基线提升2.1个百分点,并在所有主题上均有显著改善。本研究为依赖叙事上下文的文本分类任务提供了一种鲁棒且可泛化的解决方案。
原文摘要 · Abstract (English)
Identifying cultural capital (CC) themes in student reflections can offer valuable insights that help foster equitable learning environments in classrooms. However, themes such as aspirational goals or family support are often woven into narratives, rather than appearing as direct keywords. This makes them difficult to detect for standard NLP models that process sentences in isolation. The core challenge stems from a lack of awareness, as standard models are pre-trained on general corpora, leaving them blind to the domain-specific language and narrative context inherent to the data. To address this, we introduce AWARE, a framework that systematically attempts to improve a transformer model's awareness for this nuanced task. AWARE has three core components: 1) Domain Awareness, adapting the model's vocabulary to the linguistic style of student reflections; 2) Context Awareness, generating sentence embeddings that are aware of the full essay context; and 3) Class Overlap Awareness, employing a multi-label strategy to recognize the coexistence of themes in a single sentence. Our results show that by making the model explicitly aware of the properties of the input, AWARE outperforms a strong baseline by 2.1 percentage points in Macro-F1 and shows considerable improvements across all themes. This work provides a robust and generalizable methodology for any text classification task in which meaning depends on the context of the narrative.
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