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Reason4Rec: Deliberative User Preference Alignment of Large Language Models for Recommendation

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arxiv 2502.02061 v3 pith:IPBXHSGX submitted 2025-02-04 cs.IR

Reason4Rec: Deliberative User Preference Alignment of Large Language Models for Recommendation

classification cs.IR
keywords recommendationllmstaskuseralignmentdeliberativeframeworkreasoning
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Aligning Large Language Models (LLMs) with recommendation tasks represents an emerging paradigm in recommendation domain, exhibiting promising performance overall. However, these aligned recommendation LLMs often struggle with complex scenarios due to limitations in the current alignment task formulation, which optimizes LLMs to directly generate user feedback without deliberation. To develop more reliable recommendation LLMs, we introduce a new \textit{Deliberative Recommendation} task, which enforces explicit reasoning about user preferences as an additional alignment objective. To address this task, we propose a \textit{Reasoning-powered Recommender} framework designed to enhance reasoning capabilities by leveraging verbalized user feedback in a step-wise manner. Specifically, this framework employs collaborative step-wise experts alongside specifically crafted expert-wise training strategies. Extensive experiments conducted on three real-world datasets demonstrate the rationality of the deliberative task formulation and the effectiveness of the proposed framework in improving both prediction accuracy and reasoning quality. Our implementation is publicly available on GitHub: https://github.com/Peter-Fy/Reason4Rec.

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Cited by 9 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. User Simulator-Guided Multi-Turn Preference Optimization for Reasoning LLM-based Conversational Recommendation

    cs.IR 2026-04 unverdicted novelty 7.0

    SMTPO uses multi-task SFT to improve simulator feedback quality and RL with fine-grained rewards to optimize multi-turn preference reasoning in LLM-based conversational recommendation.

  2. WhisperRec: Latent Reasoning for Efficient Foundation Recommendation Models

    cs.IR 2026-07 conditional novelty 6.0

    WhisperRec distills multi-view chain-of-thought rationale into three latent tokens, beating explicit-reasoning recommenders at about ten times the inference throughput.

  3. Intuition-Guided Latent Reasoning for LLM-Based Recommendation

    cs.IR 2026-06 unverdicted novelty 6.0

    IntuRec anchors LLM latent reasoning for recommendation by deriving an intuition embedding from top-K candidates via self- and cross-attention to initialize more accurate trajectories.

  4. RRCM: Ranking-Driven Retrieval over Collaborative and Meta Memories for LLM Recommendation

    cs.IR 2026-05 unverdicted novelty 6.0

    RRCM trains an LLM to dynamically retrieve from collaborative and meta memories using group relative policy optimization driven by final top-k recommendation quality.

  5. Factorized Latent Reasoning for LLM-based Recommendation

    cs.IR 2026-04 unverdicted novelty 6.0

    FLR factorizes latent reasoning into multiple preference factors using multi-factor attention and regularizations, outperforming baselines on recommendation benchmarks while adding robustness and interpretability.

  6. A Survey on Generative Recommendation: Data, Model, and Tasks

    cs.IR 2025-10 accept novelty 6.0

    This survey organizes generative recommendation into data, model, and task dimensions, identifying five advantages including world knowledge integration and creative generation while noting challenges in benchmarks an...

  7. Beyond Action Imitation: Learning a Decision-Aware User Simulator for Online Advertising

    cs.IR 2026-07 conditional novelty 5.5

    DASH folds cross-domain user histories, distills teacher thinking traces, and RL-tunes a small LLM with action plus rubric rewards to jointly predict ad actions and decision traces on Tencent data.

  8. Why Thinking Hurts: Diagnosing and Rectifying Linguistic Inertia in Large Language Models for Recommendation

    cs.IR 2026-02 conditional novelty 5.0

    Chain-of-thought reasoning degrades semantic-ID recommendation accuracy through 'linguistic inertia,' and a training-free compression-plus-contrastive decoding fix restores and often improves accuracy.

  9. Towards Reasoning Era: A Survey of Long Chain-of-Thought for Reasoning Large Language Models

    cs.AI 2025-03 unverdicted novelty 5.0

    The paper unifies perspectives on Long CoT in reasoning LLMs by introducing a taxonomy, detailing characteristics of deep reasoning and reflection, and discussing emergence phenomena and future directions.