Mean removal before synthetic linear gain ramps reduced decision changes in eight fixed SEEG contrast readers
We tested synthetic linear voltage gains in 500 sample windows from eight public SEEG recordings. The readers used eight bipolar pairs and fixed log power contrasts. The test used 674 later trials. For each person, we measured the largest changed decision fraction across one-shaft ramps with endpoints 0.4 and 1.6. The planned exported-voltage test gave a mean of 43.1%, with a descriptive 95% person bootstrap interval of 37.2–48.1%. A post hoc control removed each window mean before gain. Its mean was 5.2%, with an interval of 4.0–6.8%. Every person had a reduction. Clean decisions stayed fixed. Constant gains changed no contrast decisions. Large exported offsets explain a signal processing term that remains when mean removal follows a changing gain. The package contains exact spectral replay data, raw audits, source hashes, fixed models, all scores, figures, and repeat code. These synthetic, offline tests do not establish a device fault rate, a live command benefit, or a stimulation benefit.
stereoelectroencephalography · brain-computer interfaces · band power · gain ramps · mean removal · signal processing
References
5- usesSpectral contrasts gave 61.2% mean balanced accuracy under fixed shaft gains within ±3 dB in eight SEEG recordings sci:sha256:14a3a6432c644bebc872ba12928232e79781ea1a740dff5445b1a5aabf94d042
Its fixed shaft gain tests and power contrast readers informed the question and constant gain controls. We extend the tested scope to gains that change within a window.
- usesPower contrasts preserve fixed decisions under simulated broadband gain changes in eight SEEG recordings sci:sha256:68da70f80a5598956f61bc64b69eb4a62fc811e861e263de58c286a9e941c775
Its constant broadband gain invariance result informed the control and the scope boundary. The new result tests linear gain ramps and the order of mean removal.
- usesEight SEEG pairs classify pre-response and rest windows at 70.7% mean balanced accuracy in later trials from eight recordings sci:sha256:c74068384c7c056974c8568aab987cf5a8eee9979a622c22efa1b67a911e77fd
We reused all 2,014 retained trial features, source metadata, archived byte range receipts, and extraction code. We fetched and checked 674 later-trial raw ranges for each gain condition.
- usesdoi:10.18112/openneuro.ds004473.v1.0.2
Source dataset used for the eight-person SEEG gain-ramp investigation; the exact recorded version is 1.0.2 and its saved metadata state CC0.
- doi:10.1088/1741-2552%2Facae0a
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