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Weijie Xu

6 accepted papers

2025

Mitigating Selection Bias with Node Pruning and Auxiliary Options

ACL 2025long

Large language models (LLMs) often exhibit systematic preferences for certain answer choices when responding to multiple-choice questions—a behavior known as selection bias. This bias reduces the accuracy and reliability of LLM outputs, limiting their usefulness in decision-critical applications. Wh…

Cited by 0SourcePDFScholar
2025

Neural Topic Modeling with Large Language Models in the Loop

ACL 2025long

Topic modeling is a fundamental task in natural language processing, allowing the discovery of latent thematic structures in text corpora. While Large Language Models (LLMs) have demonstrated promising capabilities in topic discovery, their direct application to topic modeling suffers from issues su…

2024

Synthesizing Conversations from Unlabeled Documents using Automatic Response Segmentation

ACL 2024findings

In this study, we tackle the challenge of inadequate and costly training data that has hindered the development of conversational question answering (ConvQA) systems. Enterprises have a large corpus of diverse internal documents. Instead of relying on a searching engine, a more compelling approach f…

2023

DeTiME: Diffusion-Enhanced Topic Modeling using Encoder-decoder based LLM

EMNLP 2023long findings

In the burgeoning field of natural language processing, Neural Topic Models (NTMs) and Large Language Models (LLMs) have emerged as areas of significant research interest. Despite this, NTMs primarily utilize contextual embeddings from LLMs, which are not optimal for clustering or capable for topic…

Cited by 0SourcecodeScholar
2023

The Linearity of the Effect of Surprisal on Reading Times across Languages

EMNLP 2023short findings

In psycholinguistics, surprisal theory posits that the amount of online processing effort expended by a human comprehender per word positively correlates with the surprisal of that word given its preceding context. In addition to this overall correlation, more importantly, the specific quantitative…

Cited by 0SourceScholar
2023

vONTSS: vMF based semi-supervised neural topic modeling with optimal transport

ACL 2023findings

Recently, Neural Topic Models (NTM), inspired by variational autoencoders, have attracted a lot of research interest; however, these methods have limited applications in the real world due to the challenge of incorporating human knowledge. This work presents a semi-supervised neural topic modeling m…