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A Balanced Data Approach for Evaluating Cross-Lingual Transfer: Mapping the Linguistic Blood Bank

2022-05-09 07:32:50
Dan Malkin, Tomasz Limisiewicz, Gabriel Stanovsky
arXiv_AI
         
Abstract

We show that the choice of pretraining languages affects downstream cross-lingual transfer for BERT-based models. We inspect zero-shot performance in balanced data conditions to mitigate data size confounds, classifying pretraining languages that improve downstream performance as donors, and languages that are improved in zero-shot performance as recipients. We develop a method of quadratic time complexity in the number of languages to estimate these relations, instead of an exponential exhaustive computation of all possible combinations. We find that our method is effective on a diverse set of languages spanning different linguistic features and two downstream tasks. Our findings can inform developers of large-scale multilingual language models in choosing better pretraining configurations.

Abstract (translated)

URL

https://arxiv.org/abs/2205.04086

PDF

https://arxiv.org/pdf/2205.04086.pdf

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