Substitution-based Semantic Change Detection using Contextual Embeddings

Dallas Card

Main: Semantics: Lexical Main-poster Paper

Poster Session 3: Semantics: Lexical (Poster)
Conference Room: Frontenac Ballroom and Queen's Quay
Conference Time: July 11, 09:00-10:30 (EDT) (America/Toronto)
Global Time: July 11, Poster Session 3 (13:00-14:30 UTC)
Keywords: lexical semantic change
TLDR: Measuring semantic change has thus far remained a task where methods using contextual embeddings have struggled to improve upon simpler techniques relying only on static word vectors. Moreover, many of the previously proposed approaches suffer from downsides related to scalability and ease of interp...
You can open the #paper-P3828 channel in a separate window.
Abstract: Measuring semantic change has thus far remained a task where methods using contextual embeddings have struggled to improve upon simpler techniques relying only on static word vectors. Moreover, many of the previously proposed approaches suffer from downsides related to scalability and ease of interpretation. We present a simplified approach to measuring semantic change using contextual embeddings, relying only on the most probable substitutes for masked terms. Not only is this approach directly interpretable, it is also far more efficient in terms of storage, achieves superior average performance across the most frequently cited datasets for this task, and allows for more nuanced investigation of change than is possible with static word vectors.