Challenge: Existing models that generate generic aspects do not provide personalized informative recommendations.
Approach: They propose a model that integrates aspect category as another input dimension to facilitate memorizing fine-grained aspect terms.
Outcome: The proposed model outperforms baseline model on restaurant review datasets in the restaurant domain.

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Challenge: Recent years have witnessed a growing interest in the development of explainable recommendation models.
Approach: They propose a model that combines prediction and generation tasks to produce more persuasive explanations by obtaining additional information from the training sets.
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Justifying Recommendations using Distantly-Labeled Reviews and Fine-Grained Aspects (D19-1)

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Challenge: Existing approaches to generating reviews struggle to generate justifications that are relevant to users’ decision-making process.
Approach: They propose an ‘extractive’ approach to identify review segments which justify users’ intentions and use it to distantly label massive review corpora and construct large-scale personalized recommendation justification datasets.
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Tree-CoT-RT: An Explainable Multi-Path Tree-Guided Chain-of-Thought and Reinforcement Learning Framework for Aspect Sentiment Quad Prediction (2026.findings-acl)

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Challenge: Existing methods lack explainability and generalization, making it difficult to justify inference decisions and detect implicit sentiment across domains and varied expression patterns.
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Personalized Review Generation By Expanding Phrases and Attending on Aspect-Aware Representations (P18-2)

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Challenge: Existing systems that use user and item identity as inputs for review generation are lacking in the field of natural language processing.
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MAPLE: Multi-Aspect Panels of LLM Evaluators for Open-Ended Questions (2026.findings-acl)

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Challenge: LLM-as-a-Judge uses LLMs to evaluate open-ended questions . however, the discrepancy between LLM generated evaluations and human evaluations remains a critical problem in this field .
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Incorporating Review-missing Interactions for Generative Explainable Recommendation (2025.coling-main)

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Challenge: Existing models of explainable recommendation use user reviews as ground truths, but in practice, a large amount of users may not leave reviews after purchasing items.
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SynPrompt: Syntax-aware Enhanced Prompt Engineering for Aspect-based Sentiment Analysis (2024.lrec-main)

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Challenge: Existing methods of prompt-tuning for Aspect-based Sentiment Analysis (ABSA) are crude and simple.
Approach: They propose a Syntax-aware Enhanced Prompt method which mines syntactic information related to aspect words from the syntaktic dependency tree.
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Improving Personalized Explanation Generation through Visualization (2022.acl-long)

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Challenge: Existing explainable recommendation models generate repetitive sentences for different items or empty sentences with insufficient details.
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Enhancing Recommendation Explanations through User-Centric Refinement (2025.findings-emnlp)

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Challenge: Existing explanations for user reviews often fail to meet user-centric aspects, reducing their usefulness to users.
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PromptExplainer: Explaining Language Models through Prompt-based Learning (2024.findings-eacl)

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Challenge: Existing explanation methods rely on linear approximations, accentuating irrelevant input tokens.
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