Papers › Mixout: Effective Regularization to Finetune Large-scale Pretrained Language Models

Mixout: Effective Regularization to Finetune Large-scale Pretrained Language Models

25 Sep 2019ICLR 2020 1arXiv:1909.11299archive 2025-07-28

Cheolhyoung Lee, Kyunghyun Cho, Wanmo Kang

In natural language processing, it has been observed recently that generalization could be greatly improved by finetuning a large-scale language model pretrained on a large unlabeled corpus. Despite its recent success and wide adoption, finetuning a large pretrained language model on a downstream task is prone to degenerate performance when there are only a small number of training instances available. In this paper, we introduce a new regularization technique, to which we refer as "mixout", motivated by dropout. Mixout stochastically mixes the parameters of two models. We show that our mixout technique regularizes learning to minimize the deviation from one of the two models and that the strength of regularization adapts along the optimization trajectory. We empirically evaluate the proposed mixout and its variants on finetuning a pretrained language model on downstream tasks. More specifically, we demonstrate that the stability of finetuning and the average accuracy greatly increase when we use the proposed approach to regularize finetuning of BERT on downstream tasks in GLUE.

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bloodwass/mixout officialmentioned on GitHubpytorchMIT report
arjundussa65/Thesis-2020 mentioned on GitHubpytorch report

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Language ModelingLanguage Modelling

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AdamAttentionAttention DropoutBERTDense ConnectionsDropoutLayer NormalizationLinear LayerLinear Warmup With Linear DecayMulti-Head AttentionResidual ConnectionSoftmaxWeight DecayWordPiece

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