To Adapt or to Fine-tune: A Case Study on Abstractive Summarization

• URL: http://arxiv.org/abs/2208.14559v1
• Date: Tue, 30 Aug 2022 22:48:28 GMT
• Title: To Adapt or to Fine-tune: A Case Study on Abstractive Summarization
• Authors: Zheng Zhao and Pinzhen Chen
• Abstract summary: Recent advances in the field of abstractive summarization leverage pre-trained language models rather than train a model from scratch. Such models are sluggish to train and accompanied by a massive overhead. It remains uncertain whether using adapters benefits the task of summarization, in terms of improved efficiency without an unpleasant sacrifice in performance.
• Score: 7.353994554197792
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Recent advances in the field of abstractive summarization leverage pre-trained language models rather than train a model from scratch. However, such models are sluggish to train and accompanied by a massive overhead. Researchers have proposed a few lightweight alternatives such as smaller adapters to mitigate the drawbacks. Nonetheless, it remains uncertain whether using adapters benefits the task of summarization, in terms of improved efficiency without an unpleasant sacrifice in performance. In this work, we carry out multifaceted investigations on fine-tuning and adapters for summarization tasks with varying complexity: language, domain, and task transfer. In our experiments, fine-tuning a pre-trained language model generally attains a better performance than using adapters; the performance gap positively correlates with the amount of training data used. Notably, adapters exceed fine-tuning under extremely low-resource conditions. We further provide insights on multilinguality, model convergence, and robustness, hoping to shed light on the pragmatic choice of fine-tuning or adapters in abstractive summarization.

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