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Reinforcement Learning from Human Feedback (RLHF) is crucial for aligning large language models with human preferences. While recent research has focused on algorithmic improvements, the importance of prompt-data construction has been…

Machine Learning · Computer Science 2025-04-03 Wei Shen , Guanlin Liu , Zheng Wu , Ruofei Zhu , Qingping Yang , Chao Xin , Yu Yue , Lin Yan

In retrieval-augmented generation (RAG) question answering systems, generating citations for large language model (LLM) outputs enhances verifiability and helps users identify potential hallucinations. However, we observe two problems in…

Computation and Language · Computer Science 2025-10-21 Guo Chen , Qiuyuan Li , Qiuxian Li , Hongliang Dai , Xiang Chen , Piji Li

Retrieval-Augmented Generation (RAG) has significantly enhanced large language models (LLMs) in knowledge-intensive tasks by incorporating external knowledge retrieval. However, existing RAG frameworks primarily rely on semantic similarity…

Computation and Language · Computer Science 2025-04-18 Elahe Khatibi , Ziyu Wang , Amir M. Rahmani

Retrieval-Augmented Generation (RAG) systems traditionally treat retrieval and generation as separate processes, requiring explicit textual queries to connect them. This separation can limit the ability of models to generalize across…

Computation and Language · Computer Science 2025-09-19 Wenzheng Zhang , Xi Victoria Lin , Karl Stratos , Wen-tau Yih , Mingda Chen

Knowledge gaps and hallucinations are persistent challenges for Large Language Models (LLMs), which generate unreliable responses when lacking the necessary information to fulfill user instructions. Existing approaches, such as…

Computation and Language · Computer Science 2025-11-20 Riccardo Pozzi , Matteo Palmonari , Andrea Coletta , Luigi Bellomarini , Jens Lehmann , Sahar Vahdati

Despite its substantial impact on various search, recommendation, and question answering tasks, privacy-preserving methods for personalizing large language models (LLMs) have received relatively limited exploration. There is one primary…

Computation and Language · Computer Science 2025-06-27 Alireza Salemi , Hamed Zamani

Reward-guided text generation (RGTG) has emerged as a viable alternative to offline reinforcement learning from human feedback (RLHF). RGTG methods can align baseline language models to human preferences without further training like in…

Machine Learning · Computer Science 2025-07-08 Ahmad Rashid , Ruotian Wu , Rongqi Fan , Hongliang Li , Agustinus Kristiadi , Pascal Poupart

The powerful generative abilities of large language models (LLMs) show potential in generating relevance labels for search applications. Previous work has found that directly asking about relevancy, such as ``How relevant is document A to…

Information Retrieval · Computer Science 2024-04-19 Le Yan , Zhen Qin , Honglei Zhuang , Rolf Jagerman , Xuanhui Wang , Michael Bendersky , Harrie Oosterhuis

Retrieval-augmented generation (RAG) is a popular technique for using large language models (LLMs) to build customer-support, question-answering solutions. In this paper, we share our team's practical experience building and maintaining…

Information Retrieval · Computer Science 2024-10-18 Sarah Packowski , Inge Halilovic , Jenifer Schlotfeldt , Trish Smith

Despite the remarkable ability of large language models (LMs) to comprehend and generate language, they have a tendency to hallucinate and create factually inaccurate output. Augmenting LMs by retrieving information from external knowledge…

Computation and Language · Computer Science 2023-10-24 Zhengbao Jiang , Frank F. Xu , Luyu Gao , Zhiqing Sun , Qian Liu , Jane Dwivedi-Yu , Yiming Yang , Jamie Callan , Graham Neubig

Considering the limited internal parametric knowledge, retrieval-augmented generation (RAG) has been widely used to extend the knowledge scope of large language models (LLMs). Despite the extensive efforts on RAG research, in existing…

Computation and Language · Computer Science 2024-11-22 Yuhao Wang , Ruiyang Ren , Junyi Li , Wayne Xin Zhao , Jing Liu , Ji-Rong Wen

Recent advancements in Large Language Models (LLMs) have garnered wide attention and led to successful products such as ChatGPT and GPT-4. Their proficiency in adhering to instructions and delivering harmless, helpful, and honest (3H)…

Machine Learning · Computer Science 2023-10-11 Hao Sun

Despite the promise of RLHF in aligning LLMs with human preferences, it often leads to superficial alignment, prioritizing stylistic changes over improving downstream performance of LLMs. Underspecified preferences could obscure directions…

Computation and Language · Computer Science 2024-03-22 Kyungjae Lee , Dasol Hwang , Sunghyun Park , Youngsoo Jang , Moontae Lee

Language models (LMs) are known to suffer from hallucinations and misinformation. Retrieval augmented generation (RAG) that retrieves verifiable information from an external knowledge corpus to complement the parametric knowledge in LMs…

Computation and Language · Computer Science 2024-10-14 Zhuohang Li , Jiaxin Zhang , Chao Yan , Kamalika Das , Sricharan Kumar , Murat Kantarcioglu , Bradley A. Malin

Large Vision-Language Models (LVLMs) have become pivotal at the intersection of computer vision and natural language processing. However, the full potential of LVLMs Retrieval-Augmented Generation (RAG) capabilities remains underutilized.…

Computer Vision and Pattern Recognition · Computer Science 2024-09-24 Jiashuo Sun , Jihai Zhang , Yucheng Zhou , Zhaochen Su , Xiaoye Qu , Yu Cheng

Recent breakthroughs in large language models (LLMs) have fundamentally shifted recommender systems from discriminative to generative paradigms, where user behavior modeling is achieved by generating target items conditioned on historical…

Information Retrieval · Computer Science 2025-10-15 Junfei Tan , Yuxin Chen , An Zhang , Junguang Jiang , Bin Liu , Ziru Xu , Han Zhu , Jian Xu , Bo Zheng , Xiang Wang

Large language models (LLMs) inevitably exhibit hallucinations since the accuracy of generated texts cannot be secured solely by the parametric knowledge they encapsulate. Although retrieval-augmented generation (RAG) is a practicable…

Computation and Language · Computer Science 2024-10-08 Shi-Qi Yan , Jia-Chen Gu , Yun Zhu , Zhen-Hua Ling

Conversational recommender systems have attracted immense attention recently. The most recent approaches rely on neural models trained on recorded dialogs between humans, implementing an end-to-end learning process. These systems are…

Information Retrieval · Computer Science 2022-05-26 Ahtsham Manzoor , Dietmar Jannach

Large-scale language models (LMs) pretrained on massive corpora of text, such as GPT-2, are powerful open-domain text generators. However, as our systematic examination reveals, it is still challenging for such models to generate coherent…

Computation and Language · Computer Science 2021-04-15 Bowen Tan , Zichao Yang , Maruan AI-Shedivat , Eric P. Xing , Zhiting Hu

The advent of large language models (LLMs) has allowed numerous applications, including the generation of queried responses, to be leveraged in chatbots and other conversational assistants. Being trained on a plethora of data, LLMs often…

Computation and Language · Computer Science 2025-05-16 Deeksha Prahlad , Chanhee Lee , Dongha Kim , Hokeun Kim