Can You Answer This? – Exploring Zero-Shot QA Generalization Capabilities in Large Language Models (Student Abstract)

The buzz around Transformer-based language models (TLM) such as BERT, RoBERTa, etc. is well-founded owing to their impressive results on an array of tasks. However, when applied to areas needing specialized knowledge (closed-domain), such as medical, finance, etc. their performance takes drastic hits, sometimes more than their older recurrent/convolutional counterparts. In this paper, we explore zero-shot capabilities of large LMs for extractive QA. Our objective is to examine performance change in the face of domain drift i.e. when the target domain data is vastly different in semantic and statistical properties from the source domain and attempt to explain the subsequent behavior. To this end, we present two studies in this paper while planning further experiments later down the road. Our findings indicate flaws in the current generation of TLM limiting their performance on closed-domain tasks.

Authors

• Saptarshi Sengupta The Pennsylvania State University
• Shreya Ghosh The Pennsylvania State University
• Preslav Nakov Mohamed bin Zayed University of Artificial Intelligence
• Prasenjit Mitra Penn State University, State College

Keywords

• Extractive Question Answering
• Natural Language Processing
• Zero-Shot Learning