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Multi-dueling Bandits with Dependent Arms
Proceedings of the 33rd Conference on Uncertainty in Artificial Intelligence, PMLR R15:551-560, 2017.
Abstract
The dueling bandits problem is an online learning framework for learning from pairwise preference feedback, and is particularly well- suited for modeling settings that elicit subjec- tive or implicit human feedback. In this paper, we study the problem of multi-dueling bandits with dependent arms, which extends the orig- inal dueling bandits setting by simultaneously dueling multiple arms as well as modeling de- pendencies between arms. These extensions capture key characteristics found in many real- world applications, and allow for the opportu- nity to develop significantly more efficient al- gorithms than were possible in the original set- ting. We propose the SELFSPARRING algo- rithm, which reduces the multi-dueling bandits problem to a conventional bandit setting that can be solved using a stochastic bandit algo- rithm such as Thompson Sampling, and can naturally model dependencies using a Gaus- sian process prior. We present a no-regret anal- ysis for multi-dueling setting, and demonstrate the effectiveness of our algorithm empirically on a wide range of simulation settings.