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Here is ED-PPO in action! 🕹️ To test our biologically constrained architecture, we integrated Error Diffusion into PPO. It achieves competitive returns against standard backpropagation across complex locomotion tasks (Ant, HalfCheetah, Humanoid) and open-ended exploration (Craftax). But the most fascinating discovery was an emergent biological property: • Self-Organization: During training, the network's excitatory and inhibitory weights naturally converge from an asymmetric initialization toward a balanced state. • Biological Mirroring: A depth-dependent inhibitory gradient emerges, closely mirroring how real biological cortical circuits mature. This happens all without any explicit balance-enforcing mechanisms!
Diffusing Blame: Task-Dependent Credit Assignment in Biologically Plausible Dual-Stream Networks https://arxiv.org/abs/2606.31700