Towards Robust Low-Resource Fine-Tuning with Multi-View Compressed Representations

Due to the huge amount of parameters, finetuning of pretrained language models (PLMs) is prone to overfitting in the low resource scenarios. In this work, we present a novel method that operates on the hidden representations of a PLM to reduce overfitting. During fine-tuning, our method inserts random autoencoders between the hidden layers of a PLM, which transform activations from the previous layers into multi-view compressed representations before feeding them into the upper layers. The autoencoders are plugged out after fine-tuning, so our method does not add extra parameters or increase computation cost during inference. Our method demonstrates promising performance improvement across a wide range of sequenceand token-level low-resource NLP tasks. Our code is available at https://github.com/DAMO-NLP-SG/MVCR . * Equal contribution, order decided by coin flip. Linlin Liu and Xingxuan Li are under the Joint Ph.D. Program between