RDRec: Rationale Distillation for LLM-based Recommendation
Xinfeng Wang, Jin Cui, Yoshimi Suzuki, Fumiyo Fukumoto
Abstract
Large language model (LLM)-based recommender models that bridge users and items through textual prompts for effective semantic reasoning have gained considerable attention. However, few methods consider the underlying rationales behind interactions, such as user preferences and item attributes, limiting the reasoning ability of LLMs for recommendations. This paper proposes a rationale distillation recommender (RDRec), a compact model designed to learn rationales generated by a larger language model (LM). By leveraging rationales from reviews related to users and items, RDRec remarkably specifies their profiles for recommendations. Experiments show that RDRec achieves state-of-the-art (SOTA) performance in both top-N and sequential recommendations. Our code is available online.
BibTeX
@inproceedings{wang-etal-2024-rdrec,
title = "{RDR}ec: Rationale Distillation for {LLM}-based Recommendation",
author = "Wang, Xinfeng and
Cui, Jin and
Suzuki, Yoshimi and
Fukumoto, Fumiyo",
editor = "Ku, Lun-Wei and
Martins, Andre and
Srikumar, Vivek",
booktitle = "Proceedings of the 62nd Annual Meeting of the Association for Computational Linguistics (Volume 2: Short Papers)",
month = aug,
year = "2024",
address = "Bangkok, Thailand",
publisher = "Association for Computational Linguistics",
url = "https://aclanthology.org/2024.acl-short.6/",
doi = "10.18653/v1/2024.acl-short.6",
pages = "65--74"
}