NLP
ROAST: Robustifying Language Models via Adversarial Perturbation with Selective Training
November 28, 2023
Abstract
Fine-tuning pre-trained language models (LMs) has become the de facto standard in many NLP tasks. Nevertheless, fine-tuned LMs are still prone to robustness issues, such as adversarial robustness and model calibration. Several perspectives of robustness for LMs have been studied independently, but lacking a unified consideration in multiple perspectives. In this paper, we propose Robustifying LMs via Adversarial perturbation with Selective Training (ROAST), a simple yet effective fine-tuning technique to enhance the multi-perspective robustness of LMs in a unified way. ROAST effectively incorporates two important sources for the model robustness, robustness on the perturbed inputs and generalizable knowledge in pre-trained LMs. To be specific, ROAST introduces adversarial perturbation during fine- tuning while the model parameters are selectively updated upon their relative importance to minimize unnecessary deviation. Under a unified evaluation of fine-tuned LMs by incorporating four representative perspectives of model robustness, we demonstrate the effectiveness of ROAST compared to state-of-the-art fine- tuning methods on six different types of LMs, which indicates its usefulness in practice
AUTHORS
Written by
Jaehyung Kim
Rui Hou
Hanchao Yu
Davis Liang
Pascale Fung
Fuli Feng
Lifu Huang
Publisher
EMNLP
Research Topics
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