Dynamic Benchmarking of Masked Language Models on Temporal Concept Drift with Multiple Views

• URL: http://arxiv.org/abs/2302.12297v1
• Date: Thu, 23 Feb 2023 19:24:55 GMT
• Title: Dynamic Benchmarking of Masked Language Models on Temporal Concept Drift with Multiple Views
• Authors: Katerina Margatina, Shuai Wang, Yogarshi Vyas, Neha Anna John, Yassine Benajiba, Miguel Ballesteros
• Abstract summary: We benchmark $11$ pretrained language models (MLMs) on a series of tests designed to evaluate effect of temporal concept drift. Specifically, we provide a holistic framework that dynamically creates temporal test sets of any time.
• Score: 24.470873436741073
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Temporal concept drift refers to the problem of data changing over time. In NLP, that would entail that language (e.g. new expressions, meaning shifts) and factual knowledge (e.g. new concepts, updated facts) evolve over time. Focusing on the latter, we benchmark $11$ pretrained masked language models (MLMs) on a series of tests designed to evaluate the effect of temporal concept drift, as it is crucial that widely used language models remain up-to-date with the ever-evolving factual updates of the real world. Specifically, we provide a holistic framework that (1) dynamically creates temporal test sets of any time granularity (e.g. month, quarter, year) of factual data from Wikidata, (2) constructs fine-grained splits of tests (e.g. updated, new, unchanged facts) to ensure comprehensive analysis, and (3) evaluates MLMs in three distinct ways (single-token probing, multi-token generation, MLM scoring). In contrast to prior work, our framework aims to unveil how robust an MLM is over time and thus to provide a signal in case it has become outdated, by leveraging multiple views of evaluation.

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