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Abstractive summarization aims at generating natural language summaries of a source document that are succinct while preserving the important elements. Despite recent advances, neural text summarization models are known to be susceptible to…

Computation and Language · Computer Science 2024-09-05 Zhenzhen Liu , Chao Wan , Varsha Kishore , Jin Peng Zhou , Minmin Chen , Kilian Q. Weinberger

Object hallucination is a significant challenge that hinders the application of large vision-language models (LVLMs) in practice. We hypothesize that one possible origin of hallucination is the model's tendency to prioritize text generation…

Computer Vision and Pattern Recognition · Computer Science 2026-05-21 Meng Shen , Minghao Wu , Deepu Rajan

State-of-the-art abstractive summarization systems often generate \emph{hallucinations}; i.e., content that is not directly inferable from the source text. Despite being assumed incorrect, we find that much hallucinated content is factual,…

Computation and Language · Computer Science 2021-12-07 Meng Cao , Yue Dong , Jackie Chi Kit Cheung

Hallucinations are a type of output error produced by deep neural networks. While this has been studied in natural language processing, they have not been researched previously in automatic speech recognition. Here, we define hallucinations…

Computation and Language · Computer Science 2024-01-04 Rita Frieske , Bertram E. Shi

The contemporary LLMs are prone to producing hallucinations, stemming mainly from the knowledge gaps within the models. To address this critical limitation, researchers employ diverse strategies to augment the LLMs by incorporating external…

Computation and Language · Computer Science 2024-03-19 Garima Agrawal , Tharindu Kumarage , Zeyad Alghamdi , Huan Liu

Pre-trained language models (e.g. BART) have shown impressive results when fine-tuned on large summarization datasets. However, little is understood about this fine-tuning process, including what knowledge is retained from pre-training time…

Computation and Language · Computer Science 2022-03-16 Tanya Goyal , Jiacheng Xu , Junyi Jessy Li , Greg Durrett

The widespread adoption of large language models (LLMs) across diverse AI applications is proof of the outstanding achievements obtained in several tasks, such as text mining, text generation, and question answering. However, LLMs are not…

Computation and Language · Computer Science 2023-11-15 Alessandro Bruno , Pier Luigi Mazzeo , Aladine Chetouani , Marouane Tliba , Mohamed Amine Kerkouri

Although many studies have investigated and reduced hallucinations in large language models (LLMs) for single-document tasks, research on hallucination in multi-document summarization (MDS) tasks remains largely unexplored. Specifically, it…

Computation and Language · Computer Science 2025-04-29 Catarina G. Belem , Pouya Pezeshkpour , Hayate Iso , Seiji Maekawa , Nikita Bhutani , Estevam Hruschka

Hallucinations in large language models (LLMs) during summarization of patient-clinician dialogues pose significant risks to patient care and clinical decision-making. However, the phenomenon remains understudied in the clinical domain,…

Large Language Models (LLMs) often generate incorrect or unsupported content, known as hallucinations. Existing detection methods rely on heuristics or simple models over isolated computational traces such as activations, or attention maps.…

Machine Learning · Computer Science 2025-09-30 Fabrizio Frasca , Guy Bar-Shalom , Yftah Ziser , Haggai Maron

Traditional language models face a challenge from hallucinations. Their very presence casts a large, dangerous shadow over the promising realm of natural language processing. It becomes crucial to understand the various kinds of…

Computation and Language · Computer Science 2025-12-03 Parth Pulkundwar , Vivek Dhanawade , Rohit Yadav , Minal Sonkar , Medha Asurlekar , Sarita Rathod

Information visualizations such as bar charts and line charts are very popular for exploring data and communicating insights. Interpreting and making sense of such visualizations can be challenging for some people, such as those who are…

Computation and Language · Computer Science 2020-12-01 Jason Obeid , Enamul Hoque

This paper primarily focuses on the hallucinations caused due to AI language models(LLMs).LLMs have shown extraordinary Language understanding and generation capabilities .Still it has major a disadvantage hallucinations which give outputs…

Computation and Language · Computer Science 2026-04-07 Sailesh kiran kurra , Shiek Ruksana , Vishal Borusu

Large language models are prone to hallucinating factually incorrect statements. A key source of these errors is exposure to new factual information through supervised fine-tuning (SFT), which can increase hallucinations w.r.t. knowledge…

Computation and Language · Computer Science 2026-04-20 Guy Kaplan , Zorik Gekhman , Zhen Zhu , Lotem Rozner , Yuval Reif , Swabha Swayamdipta , Derek Hoiem , Roy Schwartz

Language models have shown strong capabilities across a wide range of tasks in software engineering, such as code generation, yet they suffer from hallucinations. While hallucinations have been studied independently in natural language and…

Software Engineering · Computer Science 2025-08-13 Chunhua Liu , Hong Yi Lin , Patanamon Thongtanunam

In this work, we study hallucinations in Neural Machine Translation (NMT), which lie at an extreme end on the spectrum of NMT pathologies. Firstly, we connect the phenomenon of hallucinations under source perturbation to the Long-Tail…

Computation and Language · Computer Science 2021-04-15 Vikas Raunak , Arul Menezes , Marcin Junczys-Dowmunt

Reducing hallucinations in abstractive summarization remains a critical challenge for deploying language models (LMs) in real-world settings. In this work, we introduce a rewarddriven fine-tuning framework that explicitly optimizes for…

Computation and Language · Computer Science 2025-07-31 Praveenkumar Katwe , Rakesh Chandra , Balabantaray Kali , Prasad Vittala

Recent advancements in large vision-language models (LVLMs) have demonstrated impressive capability in visual information understanding with human language. Despite these advances, LVLMs still face challenges with multimodal hallucination,…

Computer Vision and Pattern Recognition · Computer Science 2024-05-16 Zongbo Han , Zechen Bai , Haiyang Mei , Qianli Xu , Changqing Zhang , Mike Zheng Shou

It is widely known that hallucination is a critical issue in Simultaneous Machine Translation (SiMT) due to the absence of source-side information. While many efforts have been made to enhance performance for SiMT, few of them attempt to…

Computation and Language · Computer Science 2024-06-12 Meizhi Zhong , Kehai Chen , Zhengshan Xue , Lemao Liu , Mingming Yang , Min Zhang

Recent methodologies utilizing synthetic datasets have aimed to address inconsistent hallucinations in large language models (LLMs); however,these approaches are primarily tailored to specific tasks, limiting their generalizability.…

Artificial Intelligence · Computer Science 2025-02-28 Xinxin You , Xien Liu , Qixin Sun , Huan Zhang , Kaiyin Zhou , Shaohui Liu , GuoPing Hu , ShiJin Wang , Si Liu , Ji Wu