Mitchell Wortsman


2022

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Exploring The Landscape of Distributional Robustness for Question Answering Models
Anas Awadalla | Mitchell Wortsman | Gabriel Ilharco | Sewon Min | Ian Magnusson | Hannaneh Hajishirzi | Ludwig Schmidt
Findings of the Association for Computational Linguistics: EMNLP 2022

We conduct a large empirical evaluation to investigate the landscape of distributional robustness in question answering. Our investigation spans over 350 models and 16 question answering datasets, including a diverse set of architectures, model sizes, and adaptation methods (e.g., fine-tuning, adapter tuning, in-context learning, etc.). We find that, in many cases, model variations do not affect robustness and in-distribution performance alone determines out-of-distribution performance. Moreover, our findings indicate thati) zero-shot and in-context learning methods are more robust to distribution shifts than fully fine-tuned models;ii) few-shot prompt fine-tuned models exhibit better robustness than few-shot fine-tuned span prediction models;iii) parameter-efficient and robustness enhancing training methods provide no significant robustness improvements. In addition, we publicly release all evaluations to encourage researchers to further analyze robustness trends for question answering models.