activity
20232026
most citedStumbling Blocks: Stress Testing the Robustness of Machine-Generated Text Detectors Under Attacks

2 citations · 4 across the 10 of their papers we have counts for

collaborators

12 papers

cs.CL2026

When Confidence Rises Too Early: Detecting Shortcut Reasoning via Premature Answer Commitment

Zhaohan Zhang, Junjie Liu, Chengzhengxu Li +6

The reasoning trajectory of a Large Language Model (LLM) is often treated as a verbalized description of its internal reasoning. However, such trajectories can be unfaithful: a mod…

cs.CR2026

MGTEVAL: An Interactive Platform for Systemtic Evaluation of Machine-Generated Text Detectors

Yuanfan Li, Qi Zhou, Chengzhengxu Li +5

We present MGTEVAL, an extensible platform for systematic evaluation of Machine-Generated Text (MGT) detectors. Despite rapid progress in MGT detection, existing evaluations are of…

cs.CL2026

Confidence Should Be Calibrated More Than One Turn Deep

Zhaohan Zhang, Chengzhengxu Li, Xiaoming Liu +3

Large Language Models (LLMs) are increasingly applied in high-stakes domains such as finance, healthcare, and education, where reliable multi-turn interactions with users are essen…

cs.CL2025

DEER: Disentangled Mixture of Experts with Instance-Adaptive Routing for Generalizable Machine-Generated Text Detection

Guoxin Ma, Xiaoming Liu, Hongyang Chen +6

Detecting machine-generated text has become a critical challenge amid the rapid advancement of LLMs, yet existing detectors degrade severely under domain shift. Through systematic…

cs.CL2025

Can Reasoning Path still be Effective as Input? Bridging Post-Reasoning to Chain-of-Thought Compression

Chengzhengxu Li, Xiaoming Liu, Zhaohan Zhang +5

Recent developments have enabled advanced reasoning in Large Language Models (LLMs) via long Chain-of-Thought (CoT), trading efficiency during inference for performance. Existing w…

cs.CR2025

Iron Sharpens Iron: Defending Against Attacks in Machine-Generated Text Detection with Adversarial Training

Yuanfan Li, Zhaohan Zhang, Chengzhengxu Li +2

Machine-generated Text (MGT) detection is crucial for regulating and attributing online texts. While the existing MGT detectors achieve strong performance, they remain vulnerable t…

cs.CL2024

Concentrate Attention: Towards Domain-Generalizable Prompt Optimization for Language Models

Chengzhengxu Li, Xiaoming Liu, Zhaohan Zhang +4

Recent advances in prompt optimization have notably enhanced the performance of pre-trained language models (PLMs) on downstream tasks. However, the potential of optimized prompts…

cs.CL2024★ 1 cited

StablePT: Towards Stable Prompting for Few-shot Learning via Input Separation

Xiaoming Liu, Chen Liu, Zhaohan Zhang +4

Large language models have shown their ability to become effective few-shot learners with prompting, revolutionizing the paradigm of learning with data scarcity. However, this appr…

cs.CL2024★ 2 cited

Stumbling Blocks: Stress Testing the Robustness of Machine-Generated Text Detectors Under Attacks

Yichen Wang, Shangbin Feng, Abe Bohan Hou +5

The widespread use of large language models (LLMs) is increasing the demand for methods that detect machine-generated text to prevent misuse. The goal of our study is to stress tes…

cs.CL2024★ 1 cited

Does DetectGPT Fully Utilize Perturbation? Bridging Selective Perturbation to Fine-tuned Contrastive Learning Detector would be Better

Shengchao Liu, Xiaoming Liu, Yichen Wang +5

The burgeoning generative capabilities of large language models (LLMs) have raised growing concerns about abuse, demanding automatic machine-generated text detectors. DetectGPT, a…

cs.CL2023

Improving Pacing in Long-Form Story Planning

Yichen Wang, Kevin Yang, Xiaoming Liu +1

Existing LLM-based systems for writing long-form stories or story outlines frequently suffer from unnatural pacing, whether glossing over important events or over-elaborating on in…

cs.LG2023

Dialogue for Prompting: a Policy-Gradient-Based Discrete Prompt Generation for Few-shot Learning

Chengzhengxu Li, Xiaoming Liu, Yichen Wang +3

Prompt-based pre-trained language models (PLMs) paradigm have succeeded substantially in few-shot natural language processing (NLP) tasks. However, prior discrete prompt optimizati…