Xianghe Ma


2024

pdf bib
Presence or Absence: Are Unknown Word Usages in Dictionaries?
Xianghe Ma | Dominik Schlechtweg | Wei Zhao
Proceedings of the 5th Workshop on Computational Approaches to Historical Language Change

pdf bib
Graph-based Clustering for Detecting Semantic Change Across Time and Languages
Xianghe Ma | Michael Strube | Wei Zhao
Proceedings of the 18th Conference of the European Chapter of the Association for Computational Linguistics (Volume 1: Long Papers)

Despite the predominance of contextualized embeddings in NLP, approaches to detect semantic change relying on these embeddings and clustering methods underperform simpler counterparts based on static word embeddings. This stems from the poor quality of the clustering methods to produce sense clusters—which struggle to capture word senses, especially those with low frequency. This issue hinders the next step in examining how changes in word senses in one language influence another. To address this issue, we propose a graph-based clustering approach to capture nuanced changes in both high- and low-frequency word senses across time and languages, including the acquisition and loss of these senses over time. Our experimental results show that our approach substantially surpasses previous approaches in the SemEval2020 binary classification task across four languages. Moreover, we showcase the ability of our approach as a versatile visualization tool to detect semantic changes in both intra-language and inter-language setups. We make our code and data publicly available.