Add Predictive Coding PC model (hierarchical RSA, THINGS-fMRI)#2352
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nilsleut wants to merge 2 commits intobrain-score:masterfrom
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Add Predictive Coding PC model (hierarchical RSA, THINGS-fMRI)#2352nilsleut wants to merge 2 commits intobrain-score:masterfrom
nilsleut wants to merge 2 commits intobrain-score:masterfrom
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@brain-score-bot retest |
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You can re-trigger unit tests by closing and re-opening the PR. |
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Hierarchical Predictive Coding network (Rao & Ballard 1999) trained on
ResNet-50 features, evaluated against 7T fMRI (THINGS-fMRI, N=3 subjects)
via RSA across V1–IT.
Layers: r0 (256-dim, V1-analog) → r1 (512) → r2 (1024) → r3 (2048, IT-analog)
Key result: crossing hierarchy gradient r0↔V1, r3↔IT
(Δr0−Δr3 = +0.266, p=0.007, replicated in all 3 subjects).
PC r0 outperforms ViT-B/16 and CLIP at V1.
Region-layer map: V1→r0, V2/V4→r1, IT→r3