Test-Time Collective Action: Proxy-Based Perturbations for Correcting Algorithmic Harms

In three linesNew framework enabling user collectives to correct algorithmic disparities without platform intervention. Test-Time Collective Action (TTCA) uses universal perturbations derived from a proxy model to improve fairness without training access. Validation on CIFAR-10, CIFAR-100, and FairFace demonstrates closure of subgroup accuracy gaps and improved worst-group accuracy.

Summary generated by Claude — human-verified