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Data Augmentation Using Pre-trained Transformer Models

Varun Kumar, Ashutosh Choudhary, Eunah Cho. Proceedings of the 2nd Workshop on Life-long Learning for Spoken Language Systems 2020 – 39 citations

[Paper]    
Model Architecture GPT Transformer BERT Evaluation

Language model based pre-trained models such as BERT have provided significant gains across different NLP tasks. In this paper, we study different types of transformer based pre-trained models such as auto-regressive models (GPT-2), auto-encoder models (BERT), and seq2seq models (BART) for conditional data augmentation. We show that prepending the class labels to text sequences provides a simple yet effective way to condition the pre-trained models for data augmentation. Additionally, on three classification benchmarks, pre-trained Seq2Seq model outperforms other data augmentation methods in a low-resource setting. Further, we explore how different pre-trained model based data augmentation differs in-terms of data diversity, and how well such methods preserve the class-label information.

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