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On Measuring the Intrinsic Few-Shot Hardness of Datasets

11/16/2022
by   Xinran Zhao, et al.
0

While advances in pre-training have led to dramatic improvements in few-shot learning of NLP tasks, there is limited understanding of what drives successful few-shot adaptation in datasets. In particular, given a new dataset and a pre-trained model, what properties of the dataset make it few-shot learnable and are these properties independent of the specific adaptation techniques used? We consider an extensive set of recent few-shot learning methods, and show that their performance across a large number of datasets is highly correlated, showing that few-shot hardness may be intrinsic to datasets, for a given pre-trained model. To estimate intrinsic few-shot hardness, we then propose a simple and lightweight metric called "Spread" that captures the intuition that few-shot learning is made possible by exploiting feature-space invariances between training and test samples. Our metric better accounts for few-shot hardness compared to existing notions of hardness, and is  8-100x faster to compute.

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Code Repositories

intrinsic_fewshot_hardness

This is the github repo for EMNLP 2022 paper "On Measuring the Intrinsic Few-Shot Hardness of Datasets".


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