Active Learning for Multiple Target Models

We present a novel setting of active learning (AL) where multiple target models are simultaneously learned. This setting arises in real-world applications where machine learning systems require training multiple models on the same labeled dataset to accommodate diverse devices with varying computational resources. However, traditional AL methods are often limited by their model dependence and non-transferability. In this paper, we address the question of whether an effective AL method can be designed for multiple target models. We analyze the query complexity of active and passive learning in this setting and demonstrate the potential for AL to achieve improved query complexity. Based on this insight, we further propose an agnostic AL sampling strategy which selects examples located in the joint disagreement regions of different target models. Experimental evaluations on classification and regression benchmarks validate the effectiveness of our approach over traditional AL methods.