1Cademy - Multilingual Encoder + CJK-Only Queries Jumps MOOC-CS Hierarchical R@10 to 68.1

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MOOC-CS: Language-Matched Controls (Results) in Auditable Strict-Parity Evaluation of Prerequisite-Graph Retrieval for RAG under Leakage Controls
Method Part 1: Multilingual Encoder + CJK Query Rewrite as a MOOC-CS Control (Auditable Strict-Parity Graph-RAG Paper)

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Multilingual Encoder + CJK-Only Queries Jumps MOOC-CS Hierarchical R@10 to 68.1

On MOOC-CS ( $n = 103$ ), combining a multilingual dense encoder with CJK-only queries produces the language-matched control jump: flat-dense Recall@ $10$ rises to $49.2$ $[44.8, 53.6]$ , the hierarchical baseline rises to $68.1$ $[62.1, 74.1]$ , and Adaptive (heuristic) reaches $65.5$ $[58.6, 72.3]$ . The configuration is reported as a control rather than a strict-parity headline because both the encoder and query interface change relative to the default setup.

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Updated 2026-05-17

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Reference: Auditable Strict-Parity Evaluation of Prerequisite-Graph Retrieval for RAG under Leakage Controls

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