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---
title: "推荐思维链 (Recommendation CoT)"
created: 2026-06-10
updated: 2026-06-10
type: concept
tags: [recommendation, chain-of-thought, reasoning]
sources: [raw/papers/onereason-team-onereason-2026.md]
---
# 推荐思维链 (Recommendation CoT)
> 专门为推荐任务设计的 Chain-of-Thought 推理格式,区别于通用 LLM 的 CoT。
## 与通用 CoT 的区别
通用 [[chain-of-thought|思维链 (CoT)]] 面向数学/代码/逻辑等有唯一正确答案的任务。推荐 CoT 需要处理:
- **多解输出**:多个 item 都可以是合理推荐
- **隐含意图**:用户意图不可观测,需从 [[itemic-tokens|itemic token]] 序列推断
- **时序演化**:兴趣随时间变化,需建模长期/短期/周期偏好
## OneReason 的三层 CoT 结构
OneReason 提出 cognition-enhanced CoT包含三个层次
### R1: Derivation推导
从单个 item 语义推理 item-to-item 关系,通过常识或知识关联从噪声交互历史中提取潜在兴趣。
### R2: Evolution演化
将同一潜在兴趣的 item 建模为时序过程,捕捉长期、短期和周期性偏好。
### R3: Recommendation推荐
在所有服务域(短视频、直播等)中连贯推理,产出高质量推荐决策。
## CoT 鲁棒性的两个条件
借鉴多模态 LLM 研究,推荐 CoT 的有效性依赖:
1. **[[itemic-text-alignment|跨模态对齐]]**(感知层面)
2. **粗到细的推理格式**(认知层面)
## 参考
- [[chain-of-thought|思维链 (CoT)]]
- [[onereason|OneReason]]
- [[recommendation-reasoning|推荐推理]]
- [[perception-cognition-recommendation|感知-认知推荐层次]]