高阶汉语学习者语调量趋近母语，但结构映射严重偏离。
Quantity Convergence, Quality Divergence: Disentangling Fluency and Accuracy in L2 Mandarin Prosody
- 结合音系标注与依存语法分析，量化语调边界与句法关系的匹配度。
- 高阶学习者在大短语层级边界数量接近母语者，但映射错误率达30%以上。
- 适合研究二语习得、语音韵律或语言教学的学者参考。
尽管第二语言（L2）学习者可能掌握目标语的句法词序，但将其映射到恰当的语调结构仍是持久挑战。本研究通过对比67名母语汉语者与67名越南学习者，利用BLCU-SAIT语料库，结合C-ToBI语调边界标注与依存语法分析，考察了语调边界数量及其与句法关系的映射。结果显示，学习者在语调边界数量上呈现非线性发展：高阶学习者（VNH）在大短语层级（B3）的边界数量已趋近母语基准，但其结构映射显著偏离。具体表现为：在主谓接口（SBV）处，语调边界从大短语层级（B3）降级至词级（B1），而在动宾接口（VOB）处则错误提升至大短语层级（B3）。该策略使学习者维持较高长句产出水平，却牺牲了结构准确性，导致语调层级关系被扭曲，母语模式被反转。
原文摘要 · Abstract (English)
While second language (L2) learners may acquire target syntactic word order, mapping this syntax onto appropriate prosodic structures remains a persistent challenge. This study investigates the fossilization and stability of the L2 syntax-prosody interface by comparing 67 native Mandarin speakers with 67 Vietnamese learners using the BLCU-SAIT corpus. By integrating C-ToBI boundary annotation with Dependency Grammar analysis, we examined both the quantity of prosodic boundaries and their mapping to syntactic relations. Results reveal a non-linear acquisition: although high-proficiency learners (VNH) converge to the native baseline in boundary quantity at the Major Phrase level (B3), their structural mapping significantly diverges. Specifically, VNH demote the prosodic boundary at the Subject-Verb (SBV) interface (Major Phrase B3 -> Prosodic Word B1), while erroneously promoting the boundary at the Verb-Object (VOB) interface (Prosodic Word B1 -> Major Phrase B3). This strategy allows learners to maintain high long phrasal output at the expense of structural accuracy. This results in a distorted prosodic hierarchy where the native pattern is inverted.
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