Leveraging Biases in Large Language Models: "bias-kNN'' for Effective
  Few-Shot Learning
Yong Zhang Hanzhang Li Zhitao Li Ning Cheng Ming Li Jing Xiao Jianzong Wang
Large Language Models (LLMs) have shown significant promise in various
applications, including zero-shot and few-shot learning. However, their
performance can be hampered by inherent biases. Instead of traditionally sought
methods that aim to minimize or correct these biases, this study introduces a
novel methodology named ``bias-kNN''. This approach capitalizes on the biased
outputs, harnessing them as primary features for kNN and supplementing with
gold labels. Our comprehensive evaluations, spanning diverse domain text
classification datasets and different GPT-2 model sizes, indicate the
adaptability and efficacy of the ``bias-kNN'' method. Remarkably, this approach
not only outperforms conventional in-context learning in few-shot scenarios but
also demonstrates robustness across a spectrum of samples, templates and
verbalizers. This study, therefore, presents a unique perspective on harnessing
biases, transforming them into assets for enhanced model performance.