Standard accuracy and aggregate cosine metrics for feedback alignment are insufficient because they miss measurement degeneracy in terminal layers and aggregation collapse across depths; a new protocol using scale stability, reference validity, and depth utility plus per-layer reporting detects thes
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What Accuracy and Gradient Cosine Miss: Evaluating Feedback Alignment via Scale Stability, Reference Validity, and Depth Utility
Standard accuracy and aggregate cosine metrics for feedback alignment are insufficient because they miss measurement degeneracy in terminal layers and aggregation collapse across depths; a new protocol using scale stability, reference validity, and depth utility plus per-layer reporting detects thes