English Intermediate-Task Training Improves Zero-Shot Cross-Lingual Transfer Too

• URL: http://arxiv.org/abs/2005.13013v2
• Date: Wed, 30 Sep 2020 18:01:49 GMT
• Title: English Intermediate-Task Training Improves Zero-Shot Cross-Lingual Transfer Too
• Authors: Jason Phang, Iacer Calixto, Phu Mon Htut, Yada Pruksachatkun, Haokun Liu, Clara Vania, Katharina Kann, Samuel R. Bowman
• Abstract summary: Intermediatetask training improves model performance substantially on language understanding tasks in monolingual English settings. We evaluate intermediate-task transfer in a zero-shot cross-lingual setting on the XTREME benchmark. Using our best intermediate-task models for each target task, we obtain a 5.4 point improvement over XLM-R Large.
• Score: 42.95481834479966
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Intermediate-task training---fine-tuning a pretrained model on an intermediate task before fine-tuning again on the target task---often improves model performance substantially on language understanding tasks in monolingual English settings. We investigate whether English intermediate-task training is still helpful on non-English target tasks. Using nine intermediate language-understanding tasks, we evaluate intermediate-task transfer in a zero-shot cross-lingual setting on the XTREME benchmark. We see large improvements from intermediate training on the BUCC and Tatoeba sentence retrieval tasks and moderate improvements on question-answering target tasks. MNLI, SQuAD and HellaSwag achieve the best overall results as intermediate tasks, while multi-task intermediate offers small additional improvements. Using our best intermediate-task models for each target task, we obtain a 5.4 point improvement over XLM-R Large on the XTREME benchmark, setting the state of the art as of June 2020. We also investigate continuing multilingual MLM during intermediate-task training and using machine-translated intermediate-task data, but neither consistently outperforms simply performing English intermediate-task training.

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