Confidence Weighted Multitask Learning

Peng Yang, Peilin Zhao, Jiayu Zhou, Xin Gao

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Traditional online multitask learning only utilizes the firstorder information of the datastream. To remedy this issue, we propose a confidence weighted multitask learning algorithm, which maintains a Gaussian distribution over each task model to guide online learning process. The mean (covariance) of the Gaussian Distribution is a sum of a local component and a global component that is shared among all the tasks. In addition, this paper also addresses the challenge of active learning on the online multitask setting. Instead of requiring labels of all the instances, the proposed algorithm determines whether the learner should acquire a label by considering the confidence from its related tasks over label prediction. Theoretical results show the regret bounds can be significantly reduced. Empirical results demonstrate that the proposed algorithm is able to achieve promising learning efficacy, while simultaneously minimizing the labeling cost.
Original languageEnglish (US)
Pages (from-to)5636-5643
Number of pages8
JournalProceedings of the AAAI Conference on Artificial Intelligence
Volume33
DOIs
StatePublished - Aug 29 2019

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