BTA β€” Stage 4 Control A (text-only adapter)

3-seed falsification control: replaces the WavLM audio path with a frozen 4096β†’1024 linear projection P fit on 500 Stress-17K samples (numpy lstsq, train MSE 0.090, train cos-sim 0.999). All other R1.8 hyperparameters are bit-identical.

Pre-registered PASS gate: MLP-2 cohort ≀ 0.31 (= K_T floor 0.290 + 0.02). Result: 0.2122 ≀ 0.31 β†’ PASS, gap to R1.8 cohort = -0.094.

Files: A_textK_seed{1234,1235,1236}.pt (~336 MB each)

Reported metrics:

Seed Probe-K linear Probe-K MLP-2
1234 0.2276 0.2125
1235 0.2393 0.1916
1236 0.2207 0.2323
mean Β± Οƒ 0.2292 Β± 0.0094 0.2122 Β± 0.0203

Code / paper: https://github.com/Nurgali-Kadyrbek/frozen-speech-llm-stress

License: CC-BY-NC-4.0.

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