MAPLE: Enhancing Review Generation With Multi-aspect Prompt Learning In Explainable Recommendation

Yang Ching-wen, Chen Che Wei, Wu Kun-da, Xu Hao, Yao Jui-feng, Kao Hung-yu. Arxiv 2024

[Paper]    
Interpretability And Explainability Prompting Reinforcement Learning Survey Paper Tools

Explainable Recommendation task is designed to receive a pair of user and item and output explanations to justify why an item is recommended to a user. Many models treat review-generation as a proxy of explainable recommendation. Although they are able to generate fluent and grammatical sentences, they suffer from generality and hallucination issues. We propose a personalized, aspect-controlled model called Multi-Aspect Prompt LEarner (MAPLE), in which it integrates aspect category as another input dimension to facilitate the memorization of fine-grained aspect terms. Experiments on two real-world review datasets in restaurant domain show that MAPLE outperforms the baseline review-generation models in terms of text and feature diversity while maintaining excellent coherence and factual relevance. We further treat MAPLE as a retriever component in the retriever-reader framework and employ a Large-Language Model (LLM) as the reader, showing that MAPLE’s explanation along with the LLM’s comprehension ability leads to enriched and personalized explanation as a result. We will release the code and data in this http upon acceptance.

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