Evolution of Experts in Question Answering Communities


  • Aditya Pal University of Minnesota
  • Shuo Chang University of Minnesota
  • Joseph Konstan University of Minnesota




Expert Identification, Temporal Analysis


Community Question Answering (CQA) services thrive as a result of a small number of highly active users, typically called experts, who provide a large number of high quality useful answers. Understanding the temporal dynamics and interactions between experts can present key insights into how community members evolve over time. In this paper, we present a temporal study of experts in CQA and analyze the changes in their behavioral patterns over time. Further, using unsupervised machine learning methods, we show the interesting evolution patterns that can help us distinguish experts from one another. Using supervised classification methods, we show that the models based on evolutionary data of users can be more effective at expert identification than the models that ignore evolution. We run our experiments on two large online CQA to show the generality of our proposed approach.




How to Cite

Pal, A., Chang, S., & Konstan, J. (2021). Evolution of Experts in Question Answering Communities. Proceedings of the International AAAI Conference on Web and Social Media, 6(1), 274-281. https://doi.org/10.1609/icwsm.v6i1.14262