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arXiv 2109.02555cs.CLcs.AIcs.LG
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GPT-3模型在生物医学领域中是较差的Few-Shot学习者

GPT-3 Models are Poor Few-Shot Learners in the Biomedical Domain

Milad Moradi, Kathrin Blagec, Florian Haberl, Matthias Samwald

摘要:

深度神经语言模型在自然语言处理(NLP)的许多任务中取得了新的突破。最近的研究表明,深度Transformer语言模型(在大量文本上进行预训练)可以实现与最先进的模型相当的高水平的特定于任务的Few-Shot性能。然而,这些大语言模型在Few-Shot迁移学习中的能力尚未在生物医学领域中被探索。我们研究了两个强大的Transformer语言模型,即GPT-3和BioBERT,在各种生物医学NLP任务的Few-Shot设置的性能。实验结果表明,在很大程度上,这两种模型的表现都不如在完整训练数据上微调的语言模型。虽然GPT-3已经在开放域NLP任务的Few-Shot知识转移方面取得了接近最先进的结果,但它无法像BioBERT那样有效,BioBERT比GPT-3小几个数量级。关于BioBERT已经在大型生物医学文本语料库上进行了预训练,我们的研究表明,语言模型可能在很大程度上受益于特定于任务的少样本学习中的域内预训练。然而,域内预训练似乎是不够的;在生物医学NLP领域需要新的预训练和少样本学习策略。

英文摘要:

Deep neural language models have set new breakthroughs in many tasks of Natural Language Processing (NLP). Recent work has shown that deep transformer language models (pretrained on large amounts of texts) can achieve high levels of task-specific few-shot performance comparable to state-of-the-art models. However, the ability of these large language models in few-shot transfer learning has not yet been explored in the biomedical domain. We investigated the performance of two powerful transformer language models, i.e. GPT-3 and BioBERT, in few-shot settings on various biomedical NLP tasks. The experimental results showed that, to a great extent, both the models underperform a language model fine-tuned on the full training data. Although GPT-3 had already achieved near state-of-the-art results in few-shot knowledge transfer on open-domain NLP tasks, it could not perform as effectively as BioBERT, which is orders of magnitude smaller than GPT-3. Regarding that BioBERT was already pretrained on large biomedical text corpora, our study suggests that language models may largely benefit from in-domain pretraining in task-specific few-shot learning. However, in-domain pretraining seems not to be sufficient; novel pretraining and few-shot learning strategies are required in the biomedical NLP domain.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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