Local Performance vs. Out-of-Distribution Generalization: An Empirical Analysis of Personalized Federated Learning in Heterogeneous Data Environments

arXiv — cs.CVWednesday, October 29, 2025 at 4:00:00 AM
A recent study explores the challenges of personalized federated learning in heterogeneous data environments, highlighting how local models can diverge from global data distributions during training. This divergence, known as client drift, can lead to suboptimal updates when aggregating local models. Understanding these dynamics is crucial for improving federated learning systems, as it can enhance model performance across diverse clients and ensure better alignment with global objectives.
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