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Neural sequence generation models are known to "hallucinate", by producing outputs that are unrelated to the source text. These hallucinations are potentially harmful, yet it remains unclear in what conditions they arise and how to mitigate…

计算与语言 · 计算机科学 2023-02-28 Weijia Xu , Sweta Agrawal , Eleftheria Briakou , Marianna J. Martindale , Marine Carpuat

While large language models (LLMs) have shown remarkable capabilities to generate coherent text, they suffer from the issue of hallucinations -- factually inaccurate statements. Among numerous approaches to tackle hallucinations, especially…

计算与语言 · 计算机科学 2025-06-25 Juraj Vladika , Ihsan Soydemir , Florian Matthes

Neural text generation (data- or text-to-text) demonstrates remarkable performance when training data is abundant which for many applications is not the case. To collect a large corpus of parallel data, heuristic rules are often used but…

计算与语言 · 计算机科学 2020-10-13 Katja Filippova

It is well-known that abstractive summaries are subject to hallucination---including material that is not supported by the original text. While summaries can be made hallucination-free by limiting them to general phrases, such summaries…

计算与语言 · 计算机科学 2020-09-29 Zheng Zhao , Shay B. Cohen , Bonnie Webber

We address the problem of unsupervised abstractive summarization of collections of user generated reviews with self-supervision and control. We propose a self-supervised setup that considers an individual document as a target summary for a…

计算与语言 · 计算机科学 2020-05-04 Hady Elsahar , Maximin Coavoux , Matthias Gallé , Jos Rozen

As large language models continue to develop in the field of AI, text generation systems are susceptible to a worrisome phenomenon known as hallucination. In this study, we summarize recent compelling insights into hallucinations in LLMs.…

计算与语言 · 计算机科学 2023-09-14 Hongbin Ye , Tong Liu , Aijia Zhang , Wei Hua , Weiqiang Jia

Despite significant progress in neural abstractive summarization, recent studies have shown that the current models are prone to generating summaries that are unfaithful to the original context. To address the issue, we study contrast…

计算与语言 · 计算机科学 2021-04-20 Sihao Chen , Fan Zhang , Kazoo Sone , Dan Roth

Large language models (LLMs) can generate fluent natural language texts when given relevant documents as background context. This ability has attracted considerable interest in developing industry applications of LLMs. However, LLMs are…

计算与语言 · 计算机科学 2023-10-11 Deren Lei , Yaxi Li , Mengya Hu , Mingyu Wang , Vincent Yun , Emily Ching , Eslam Kamal

A frequently observed problem with LLMs is their tendency to generate output that is nonsensical, illogical, or factually incorrect, often referred to broadly as hallucination. Building on the recently proposed HalluciGen task for…

计算与语言 · 计算机科学 2025-04-30 Evangelia Gogoulou , Shorouq Zahra , Liane Guillou , Luise Dürlich , Joakim Nivre

Reasoning hallucinations in large language models (LLMs) often appear as fluent yet unsupported conclusions that violate either the given context or underlying factual knowledge. Although such failures are widely observed, the mechanisms by…

人工智能 · 计算机科学 2026-04-07 Xinnan Dai , Kai Yang , Cheng Luo , Shenglai Zeng , Kai Guo , Jiliang Tang

The widespread adoption of large language and vision models in real-world applications has made urgent the need to address hallucinations -- instances where models produce incorrect or nonsensical outputs. These errors can propagate…

计算机视觉与模式识别 · 计算机科学 2025-10-02 Zhengyi Ho , Siyuan Liang , Dacheng Tao

Despite the remarkable performance of generative large language models (LLMs) on abstractive summarization, they face two significant challenges: their considerable size and tendency to hallucinate. Hallucinations are concerning because…

计算与语言 · 计算机科学 2024-10-28 George Chrysostomou , Zhixue Zhao , Miles Williams , Nikolaos Aletras

Relation extraction is crucial for constructing knowledge graphs, with large high-quality datasets serving as the foundation for training, fine-tuning, and evaluating models. Generative data augmentation (GDA) is a common approach to expand…

计算与语言 · 计算机科学 2024-10-14 Steven Rogulsky , Nicholas Popovic , Michael Färber

Hallucination of text ungrounded in the input is a well-known problem in neural data-to-text generation. Many methods have been proposed to mitigate it, but they typically require altering model architecture or collecting additional data,…

计算与语言 · 计算机科学 2023-10-27 Mateusz Lango , Ondřej Dušek

Large language models (LLMs) frequently hallucinate on abstractive summarization tasks such as document-based question-answering, meeting summarization, and clinical report generation, even though all necessary information is included in…

Chart summarization is a crucial task for blind and visually impaired individuals as it is their primary means of accessing and interpreting graphical data. Crafting high-quality descriptions is challenging because it requires precise…

计算机视觉与模式识别 · 计算机科学 2026-03-31 Omar Moured , Jiaming Zhang , M. Saquib Sarfraz , Rainer Stiefelhagen

Hallucination is a well-known phenomenon in text generated by large language models (LLMs). The existence of hallucinatory responses is found in almost all application scenarios e.g., summarization, question-answering (QA) etc. For…

Generative artificial intelligence (AI) has found a widespread use in computing education; at the same time, quality of generated materials raises concerns among educators and students. This study addresses this issue by introducing a novel…

计算与语言 · 计算机科学 2026-01-29 Evanfiya Logacheva , Arto Hellas , Tsvetomila Mihaylova , Juha Sorva , Ava Heinonen , Juho Leinonen

Neural conditional language generation models achieve the state-of-the-art in Neural Machine Translation (NMT) but are highly dependent on the quality of parallel training dataset. When trained on low-quality datasets, these models are…

计算与语言 · 计算机科学 2023-06-16 Joël Tang , Marina Fomicheva , Lucia Specia

Neural abstractive summarization models are prone to generate summaries which are factually inconsistent with their source documents. Previous work has introduced the task of recognizing such factual inconsistency as a downstream…

计算与语言 · 计算机科学 2022-05-13 Prasetya Ajie Utama , Joshua Bambrick , Nafise Sadat Moosavi , Iryna Gurevych