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The tendency for hallucination in current large language models (LLMs) negatively impacts dialogue systems. Such hallucinations produce factually incorrect responses that may mislead users and undermine system trust. Existing refinement…

计算与语言 · 计算机科学 2026-02-18 Xiangyan Chen , Yujian Gan , Matthew Purver

Language models are prone to hallucination - generating text that is factually incorrect. Finetuning models on high-quality factual information can potentially reduce hallucination, but concerns remain; obtaining factual gold data can be…

Large language models (LLMs) are increasingly used in applications requiring factual accuracy, yet their outputs often contain hallucinated responses. While fact-checking can mitigate these errors, existing methods typically retrieve…

计算与语言 · 计算机科学 2026-01-07 Haoran Wang , Maryam Khalid , Qiong Wu , Jian Gao , Cheng Cao

The incorporation of pseudo data in the training of grammatical error correction models has been one of the main factors in improving the performance of such models. However, consensus is lacking on experimental configurations, namely,…

计算与语言 · 计算机科学 2019-09-04 Shun Kiyono , Jun Suzuki , Masato Mita , Tomoya Mizumoto , Kentaro Inui

Large language models (LLMs) often generate hallucinated content that lacks factual or contextual grounding, limiting their reliability in critical applications. Existing approaches such as supervised fine-tuning and reinforcement learning…

计算与语言 · 计算机科学 2025-12-23 Jensen Zhang , Ningyuan Liu , Yijia Fan , Zihao Huang , Qinglin Zeng , Kaitong Cai , Jian Wang , Keze Wang

The widespread adoption of Large Language Models (LLMs) has facilitated numerous benefits. However, hallucination is a significant concern. In response, Retrieval Augmented Generation (RAG) has emerged as a highly promising paradigm to…

Retrieval-Augmented Generation (RAG) reduces hallucinations by grounding answers in retrieved evidence, yet standard retrievers often exhibit retrieval sycophancy: they preferentially surface evidence that supports a user's premise, even…

计算与语言 · 计算机科学 2025-12-29 Mayank Ravishankara

Counterfactual explanations (CFE) are being widely used to explain algorithmic decisions, especially in consequential decision-making contexts (e.g., loan approval or pretrial bail). In this context, CFEs aim to provide individuals affected…

机器学习 · 计算机科学 2021-02-09 Kiarash Mohammadi , Amir-Hossein Karimi , Gilles Barthe , Isabel Valera

We propose a method for multiple hypothesis testing with familywise error rate (FWER) control, called the i-FWER test. Most testing methods are predefined algorithms that do not allow modifications after observing the data. However, in…

统计方法学 · 统计学 2021-04-20 Boyan Duan , Aaditya Ramdas , Larry Wasserman

Error correction techniques have been used to refine the output sentences from automatic speech recognition (ASR) models and achieve a lower word error rate (WER). Previous works usually adopt end-to-end models and has strong dependency on…

Large language models (LLMs) often hallucinate, yet most existing fact-checking methods treat factuality evaluation as a binary classification problem, offering limited interpretability and failing to capture fine-grained error types. In…

计算与语言 · 计算机科学 2026-01-13 Yuzhuo Bai , Shuzheng Si , Kangyang Luo , Qingyi Wang , Wenhao Li , Gang Chen , Fanchao Qi , Maosong Sun

Grammatical feedback is crucial for consolidating second language (L2) learning. Most research in computer-assisted language learning has focused on feedback through grammatical error correction (GEC) systems, rather than examining more…

计算与语言 · 计算机科学 2024-08-20 Stefano Bannò , Kate Knill , Mark J. F. Gales

For a LLM to be trustworthy, its confidence level should be well-calibrated with its actual performance. While it is now common sense that LLM performances are greatly impacted by prompts, the confidence calibration in prompting LLMs has…

计算与语言 · 计算机科学 2024-09-10 Xinran Zhao , Hongming Zhang , Xiaoman Pan , Wenlin Yao , Dong Yu , Tongshuang Wu , Jianshu Chen

Detecting AI-generated images, particularly deepfakes, has become increasingly crucial, with the primary challenge being the generalization to previously unseen manipulation methods. This paper tackles this issue by leveraging the forgery…

计算机视觉与模式识别 · 计算机科学 2025-05-20 Wentang Song , Zhiyuan Yan , Yuzhen Lin , Taiping Yao , Changsheng Chen , Shen Chen , Yandan Zhao , Shouhong Ding , Bin Li

In this work, we establish a novel theoretical connection between supervised fine-tuning and offline reinforcement learning under the token-level Markov decision process, revealing that large language models indeed learn an implicit…

计算与语言 · 计算机科学 2025-06-03 Junjie Zhang , Rushuai Yang , Shunyu Liu , Ting-En Lin , Fei Huang , Yi Chen , Yongbin Li , Dacheng Tao

Large Language Models (LLMs) can generate factually inaccurate content even if they have corresponding knowledge, which critically undermines their reliability. Existing approaches attempt to mitigate this by incorporating uncertainty in QA…

计算与语言 · 计算机科学 2026-04-14 Xiaoning Dong , Chengyan Wu , Yajie Wen , Yu Chen , Yun Xue , Jing Zhang , Wei Xu , Bolei Ma

In this contribution, we augment the metric learning setting by introducing a parametric pseudo-distance, trained jointly with the encoder. Several interpretations are thus drawn for the learned distance-like model's output. We first show…

机器学习 · 计算机科学 2020-08-17 Joao Monteiro , Isabela Albuquerque , Jahangir Alam , R Devon Hjelm , Tiago Falk

Detecting falsified faces generated by Deepfake technology is essential for safeguarding trust in digital communication and protecting individuals. However, current detectors often suffer from a dual-overfitting: they become overly…

计算机视觉与模式识别 · 计算机科学 2025-10-10 Xinan He , Yue Zhou , Shu Hu , Bin Li , Jiwu Huang , Feng Ding

The Fact Extraction and VERification (FEVER) shared task was launched to support the development of systems able to verify claims by extracting supporting or refuting facts from raw text. The shared task organizers provide a large-scale…

信息检索 · 计算机科学 2019-05-10 Andreas Hanselowski , Hao Zhang , Zile Li , Daniil Sorokin , Benjamin Schiller , Claudia Schulz , Iryna Gurevych

Fact verification systems typically assess whether a claim is supported by retrieved evidence, assuming that truthfulness depends solely on what is stated. However, many real-world claims are half-truths, factually correct yet misleading…

计算与语言 · 计算机科学 2025-09-23 Yixuan Tang , Jincheng Wang , Anthony K. H. Tung