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Tianhang Zhang

6 accepted papers

2024

ECON: On the Detection and Resolution of Evidence Conflicts

EMNLP 2024main

The rise of large language models (LLMs) has significantly influenced the quality of information in decision-making systems, leading to the prevalence of AI-generated content and challenges in detecting misinformation and managing conflicting information, or “inter-evidence conflicts.” This study in…

2024

RAGChecker: A Fine-grained Framework for Diagnosing Retrieval-Augmented Generation

NeurIPS 2024poster

Despite Retrieval-Augmented Generation (RAG) has shown promising capability in leveraging external knowledge, a comprehensive evaluation of RAG systems is still challenging due to the modular nature of RAG, evaluation of long-form responses and reliability of measurements. In this paper, we propose…

2024

RepEval: Effective Text Evaluation with LLM Representation

EMNLP 2024main

The era of Large Language Models (LLMs) raises new demands for automatic evaluation metrics, which should be adaptable to various application scenarios while maintaining low cost and effectiveness. Traditional metrics for automatic text evaluation are often tailored to specific scenarios, while LLM-…

2024

SH2: Self-Highlighted Hesitation Helps You Decode More Truthfully

EMNLP 2024finding

Large language models (LLMs) demonstrate great performance in text generation. However, LLMs are still suffering from hallucinations. In this work, we propose an inference-time method, Self-Highlighted Hesitation (SH2), to help LLMs decode more truthfully. SH2 is based on a simple fact rooted in inf…

2023

Enhancing Uncertainty-Based Hallucination Detection with Stronger Focus

EMNLP 2023long main

Large Language Models (LLMs) have gained significant popularity for their impressive performance across diverse fields. However, LLMs are prone to hallucinate untruthful or nonsensical outputs that fail to meet user expectations in many real-world applications. Existing works for detecting hallucina…

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