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Zhaoxuan Tan

21 accepted papers

2026

DRIFT: Learning from Abundant User Dissatisfaction in Real-World Preference Learning

ICLR 2026poster

Real-world large language model deployments (e.g., conversational AI systems, code generation assistants) naturally generate abundant implicit user dissatisfaction (DSAT) signals, as users iterate toward better answers through refinements, corrections, and expressed preferences, while explicit satis…

Cited by 0SourceScholar
2025

Aligning Large Language Models with Implicit Preferences from User-Generated Content

ACL 2025long

Learning from preference feedback is essential for aligning large language models (LLMs) with human values and improving the quality of generated responses. However, existing preference learning methods rely heavily on curated data from humans or advanced LLMs, which is costly and difficult to scale…

2025

CodeTaxo: Enhancing Taxonomy Expansion with Limited Examples via Code Language Prompts

ACL 2025finding

Taxonomies provide structural representations of knowledge and are crucial in various applications. The task of taxonomy expansion involves integrating emerging entities into existing taxonomies by identifying appropriate parent entities for these new query entities. Previous methods rely on self-su…

2025

Enhancing Mathematical Reasoning in LLMs by Stepwise Correction

ACL 2025long

Best-of-N decoding methods instruct large language models (LLMs) to generate multiple solutions, score each using a scoring function, and select the highest scored as the final answer to mathematical reasoning problems. However, this repeated independent process often leads to the same mistakes, mak…

2025

IHEval: Evaluating Language Models on Following the Instruction Hierarchy

NAACL 2025long

The instruction hierarchy, which establishes a priority order from system messages to user messages, conversation history, and tool outputs, is essential for ensuring consistent and safe behavior in language models (LMs). Despite its importance, this topic receives limited attention, and there is a…

2025

Modality-Aware Neuron Pruning for Unlearning in Multimodal Large Language Models

ACL 2025long

Generative models such as Large Language Models (LLMs) and Multimodal Large Language Models (MLLMs) trained on massive datasets can lead them to memorize and inadvertently reveal sensitive information, raising ethical and privacy concerns. While some prior works have explored this issue in the conte…

2025

Protecting Privacy in Multimodal Large Language Models with MLLMU-Bench

NAACL 2025long

Generative models such as Large Language Models (LLM) and Multimodal Large Language models (MLLMs) trained on massive web corpora can memorize and disclose individuals’ confidential and private data, raising legal and ethical concerns. While many previous works have addressed this issue in LLM via m…

2024

Can LLM Graph Reasoning Generalize beyond Pattern Memorization?

EMNLP 2024finding

Large language models (LLMs) demonstrate great potential for problems with implicit graphical structures, while recent works seek to enhance the graph reasoning capabilities of LLMs through specialized instruction tuning. The resulting “graph LLMs” are evaluated with in-distribution settings only, t…

2024

DELL: Generating Reactions and Explanations for LLM-Based Misinformation Detection

ACL 2024findings

Large language models are limited by challenges in factuality and hallucinations to be directly employed off-the-shelf for judging the veracity of news articles, where factual accuracy is paramount. In this work, we propose DELL that identifies three key stages in misinformation detection where LLMs…

2024

Democratizing Large Language Models via Personalized Parameter-Efficient Fine-tuning

EMNLP 2024main

Personalization in large language models (LLMs) is increasingly important, aiming to align the LLMs’ interactions, content, and recommendations with individual user preferences. Recent advances have highlighted effective prompt design by enriching user queries with non-parametric knowledge through b…

2024

Knowledge Crosswords: Geometric Knowledge Reasoning with Large Language Models

ACL 2024findings

We propose Knowledge Crosswords, a geometric knowledge reasoning benchmark consisting of incomplete knowledge networks bounded by structured factual constraints, where LLMs are tasked with inferring the missing facts to meet all constraints. The novel setting of geometric knowledge reasoning necessi…

2024

Large Language Models Can Self-Correct with Key Condition Verification

EMNLP 2024main

Intrinsic self-correct was a method that instructed large language models (LLMs) to verify and correct their responses without external feedback. Unfortunately, the study concluded that the LLMs could not self-correct reasoning yet. We find that a simple yet effective prompting method enhances LLM p…

2024

Personalized Pieces: Efficient Personalized Large Language Models through Collaborative Efforts

EMNLP 2024main

Personalized large language models (LLMs) aim to tailor interactions, content, and recommendations to individual user preferences. While parameter-efficient fine-tuning (PEFT) methods excel in performance and generalization, they are costly and limit communal benefits when used individually. To this…

2024

Towards Safer Large Language Models through Machine Unlearning

ACL 2024findings

The rapid advancement of Large Language Models (LLMs) has demonstrated their vast potential across various domains, attributed to their extensive pretraining knowledge and exceptional generalizability. However, LLMs often encounter challenges in generating harmful content when faced with problematic…

2024

What Does the Bot Say? Opportunities and Risks of Large Language Models in Social Media Bot Detection

ACL 2024long

Social media bot detection has always been an arms race between advancements in machine learning bot detectors and adversarial bot strategies to evade detection. In this work, we bring the arms race to the next level by investigating the opportunities and risks of state-of-the-art large language mod…

2023

BotPercent: Estimating Bot Populations in Twitter Communities

EMNLP 2023long findings

Twitter bot detection is vital in combating misinformation and safeguarding the integrity of social media discourse. While malicious bots are becoming more and more sophisticated and personalized, standard bot detection approaches are still agnostic to social environments (henceforth, communities) t…

Cited by 0SourcecodeScholar
2023

Can Language Models Solve Graph Problems in Natural Language?

NeurIPS 2023spotlight

Large language models (LLMs) are increasingly adopted for a variety of tasks with implicit graphical structures, such as planning in robotics, multi-hop question answering or knowledge probing, structured commonsense reasoning, and more. While LLMs have advanced the state-of-the-art on these tasks w…

2023

KALM: Knowledge-Aware Integration of Local, Document, and Global Contexts for Long Document Understanding

ACL 2023long

With the advent of pre-trained language models (LMs), increasing research efforts have been focusing on infusing commonsense and domain-specific knowledge to prepare LMs for downstream tasks. These works attempt to leverage knowledge graphs, the de facto standard of symbolic knowledge representation…

2022

Heterogeneity-Aware Twitter Bot Detection with Relational Graph Transformers

AAAI 2022technical

Twitter bot detection has become an important and challenging task to combat misinformation and protect the integrity of the online discourse. State-of-the-art approaches generally leverage the topological structure of the Twittersphere, while they neglect the heterogeneity of relations and influenc…

2022

PAR: Political Actor Representation Learning with Social Context and Expert Knowledge

EMNLP 2022main

Modeling the ideological perspectives of political actors is an essential task in computational political science with applications in many downstream tasks. Existing approaches are generally limited to textual data and voting records, while they neglect the rich social context and valuable expert k…

2022

TwiBot-22: Towards Graph-Based Twitter Bot Detection

NeurIPS 2022accept

Twitter bot detection has become an increasingly important task to combat misinformation, facilitate social media moderation, and preserve the integrity of the online discourse. State-of-the-art bot detection methods generally leverage the graph structure of the Twitter network, and they exhibit pro…