arXiv:2608.23568cs.AI2026-08

研究不同记忆呈现方式对大模型问答的影响,发现展示形式显著影响得分。

RENDER: Controlling Reader-Facing Evidence in LLM Memory Evaluation

论文配图:RENDER: Controlling Reader-Facing Evidence in LLM Memory Evaluation
图 1 · 摘自论文原文
  • 设计了五级信息包阶梯,控制输入内容但改变呈现形式。
  • 相同内容以聊天风格展示时比原始对话高42.4-72.6分。
  • 适合评估记忆系统或做RAG优化的研究者参考。

现有记忆与RAG评估常将模型输入视为实现细节,而实际系统可能以记忆条目、摘要、文本记录或原始对话等形式呈现相同历史。我们提出RENDER基准,固定对话内容但变化读者可见的表达形式。该方法结合五级信息包阶梯,定位答案内容进入输入的时间点,并使用确定性模板模拟ChatGPT风格条目、LangChain摘要、MemGPT式文本记录及原始对话。在500个LongMemEval问题和9个模型上,匹配预算的解析包比仅截取近期对话的原始对话高42.4-72.6分。在部署风格模板下,各模型最佳与最差得分相差24.6-48.8分;主评分器下,7/9模型中ChatGPT风格条目得分高于原始对话。裁判重评保持整体正向效应,但模型层面显著性不一。三个在正式账本包上得分为0%的模型,在自然语言条目上回答正确率可达45.4%-53.4%。该效应在检索噪声下仍存在,并可迁移至HotpotQA,表明记忆/RAG评估应报告或控制读者可见的表达形式。

原文摘要 · Abstract (English)

Memory and RAG evaluations often treat the answering model's input as an implementation detail, even though systems may render the same history as a memory entry, summary, typed record, or raw excerpt. We introduce RENDER, a benchmark control that fixes the conversation while varying the reader-facing artifact. RENDER combines a five-level packet ladder, localizing when answer-bearing content enters the input, with deterministic templates approximating ChatGPT-style entries, LangChain summaries, MemGPT-style typed records, and raw conversation. On 500 LongMemEval questions and nine models, matched-budget resolved packets beat recency-truncated raw dialogue by 42.4-72.6 points. In deployed-style templates, best-worst spread is 24.6-48.8 points per model; under the primary scorer, ChatGPT-style entries have higher point estimates than raw conversation on 7 of 9 models. Judge rescoring preserves the positive aggregate effect, but model-specific significance is mixed. Three models scoring 0 percent on formal ledger packets answer the same facts from natural-language entries at 45.4-53.4 percent. The effect persists under retrieval noise and transfers to HotpotQA, suggesting that memory/RAG evaluations should report or control the reader-facing artifact.

大模型评估记忆机制RAG

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