← Search

Weitao Ma

12 accepted papers

2026

Causal Tracing of Object Representations in Large Vision Language Models: Mechanistic Interpretability and Hallucination Mitigation

AAAI 2026technical

Despite the remarkable advancements of Large Vision-Language Models (LVLMs), the mechanistic interpretability remains underexplored. Existing analyses are insufficiently comprehensive and lack examination covering visual and textual tokens, model components, and the full range of layers. This limita

Cited by 0SourcePDFScholar
2026

LangGPS: Language Separability Guided Data Pre-Selection for Joint Multilingual Instruction Tuning

AAAI 2026technical

Joint multilingual instruction tuning is a widely adopted approach to improve the multilingual instruction-following ability and downstream performance of large language models (LLMs), but the resulting multilingual capability remains highly sensitive to the composition and selection of the training

Cited by 0SourcePDFScholar
2025

Alleviating Hallucinations from Knowledge Misalignment in Large Language Models via Selective Abstention Learning

ACL 2025long

Large language models (LLMs) are known to suffer from severe hallucination issues. One of the main causes lies in the knowledge misalignment between the pre-training stage and the supervised fine-tuning stage. The unfamiliar knowledge encountered during fine-tuning may encourage LLMs to generate fac…

2025

CC-Tuning: A Cross-Lingual Connection Mechanism for Improving Joint Multilingual Supervised Fine-Tuning

ACL 2025long

Current large language models (LLMs) often exhibit imbalanced multilingual capabilities due to their English-centric training corpora. To address this, existing fine-tuning approaches operating at the data-level (e.g., through data augmentation or distillation) typically introduce implicit cross-lin…

Cited by 0SourcePDFScholar
2025

From Hypothesis to Publication: A Comprehensive Survey of AI-Driven Research Support Systems

EMNLP 2025

Research is a fundamental process driving the advancement of human civilization, yet it demands substantial time and effort from researchers. In recent years, the rapid development of artificial intelligence (AI) technologies has inspired researchers to explore how AI can accelerate and enhance rese

Cited by 0SourcePDFScholar
2025

Improving Contextual Faithfulness of Large Language Models via Retrieval Heads-Induced Optimization

ACL 2025long

Ensuring contextual faithfulness in retrieval-augmented large language models (LLMs) is crucial for building trustworthy information-seeking systems, particularly in long-form question-answering (LFQA) scenarios. In this work, we identify a salient correlation between LFQA faithfulness and retrieval…

2025

One for All: Update Parameterized Knowledge Across Multiple Models with Once Edit

ACL 2025long

Large language models (LLMs) encode vast world knowledge but struggle to stay up-to-date, often leading to errors and hallucinations. Knowledge editing offers an efficient alternative to retraining, enabling targeted modifications by updating specific model parameters. However, existing methods prim…

Cited by 0SourcePDFScholar
2025

Unveiling Entity-Level Unlearning for Large Language Models: A Comprehensive Analysis

COLING 2025main

Large language model unlearning has garnered increasing attention due to its potential to address security and privacy concerns, leading to extensive research in the field. However, existing studies have predominantly focused on instance-level unlearning, specifically targeting the removal of predef…

Cited by 1SourcePDFScholar
2024

Advancing Large Language Model Attribution through Self-Improving

EMNLP 2024main

Teaching large language models (LLMs) to generate text with citations to evidence sources can mitigate hallucinations and enhance verifiability in information-seeking systems. However, improving this capability requires high-quality attribution data, which is costly and labor-intensive. Inspired by…

Cited by 6SourcePDFScholar
2024

GlobeSumm: A Challenging Benchmark Towards Unifying Multi-lingual, Cross-lingual and Multi-document News Summarization

EMNLP 2024main

News summarization in today’s global scene can be daunting with its flood of multilingual content and varied viewpoints from different sources. However, current studies often neglect such real-world scenarios as they tend to focus solely on either single-language or single-document tasks. To bridge…

2024

Investigating and Mitigating the Multimodal Hallucination Snowballing in Large Vision-Language Models

ACL 2024long

Though advanced in understanding visual information with human languages, Large Vision-Language Models (LVLMs) still suffer from multimodal hallucinations. A natural concern is that during multimodal interaction, the generated hallucinations could influence the LVLMs’ subsequent generation. Thus, we…

2024

Learning Fine-Grained Grounded Citations for Attributed Large Language Models

ACL 2024findings

Despite the impressive performance on information-seeking tasks, large language models (LLMs) still struggle with hallucinations. Attributed LLMs, which augment generated text with in-line citations, demonstrate potential in mitigating hallucinations and improving verifiability. However, current app…