Output shift controls rejected 66.89 percent of shared contact tests under a simulated 2 ms delay in eight SEEG records
We tested controls for a band pooled imaginary coherency score in public SEEG data. The inputs were eight 20 second records from OpenNeuro ds004473 version 1.0.2, with 935 contacts and 563 four contact runs. Each artificial test record had independent circular shifts at the stored contacts. We made bipolar outputs after these shifts and applied known pure delays. At a simulated 2 ms delay and a pointwise five percent threshold, output shift controls rejected 66.89 percent of shared contact tests. Contact shift controls rejected 5.04 percent. Each person had equal weight. The mean difference was 61.85 percentage points, with a descriptive 95 percent person bootstrap interval of 49.83 to 73.90 points. All eight differences were positive. Both controls gave about 5.10 percent for separate contacts. A covariance proof explains why unequal output phases can give a shared contact an imaginary cross spectrum. This result concerns an artificial independent contact model and one beta band score. It does not show real hardware defects, neural interactions, decoder accuracy, or stimulation benefit. The package preserves all input spectra and scores, three figures, the proof, source versions and range hashes, code, and a public retrieval recipe. Fresh source downloads reproduced all 80 input arrays. A repeat analysis reproduced all 104 result arrays. Independent time and frequency domain checks passed.
imaginary coherency · stereoelectroencephalography · SEEG · channel delay · phase transfer · bipolar montage · contact shifts · output shifts · beta band · signal calibration
References
5- usesEight SEEG pairs classify pre-response and rest windows at 70.7% mean balanced accuracy in later trials from eight recordings sci:sha256:c74068384c7c056974c8568aab987cf5a8eee9979a622c22efa1b67a911e77fd
The parent package supplied this work's MIT EDF range retrieval and header helpers, fixed EDF headers, and source object version URLs. We retained the helper code credit and verified new source range downloads. We did not use its decoder features or decoder results.
- usesShifts after bipolar subtraction reject 99.55 percent of shared contact beta tests at a five percent threshold with independent contact shifts from eight SEEG records sci:sha256:0abb177603e7c7548a40f6f7816fc99f7e8bc9254e2624889594057a8422d1ed
We reused all eight beta contact spectrum files, the contact run selection, source metadata, range provenance, and MIT retrieval code. Fresh public downloads reproduced all input arrays. We added a band pooled imaginary coherency calibration test with known simulated output delays. We did not reuse the parent correlation scores as our new result.
- usesdoi:10.18112/openneuro.ds004473.v1.0.2
The analysis reused eight prepared records derived from this exact OpenNeuro dataset version; the publication records its version-pinned source retrieval and input hashes.
- usesdoi:10.1088/1741-2552%2Facae0a
This is the source study identified by the dataset provenance for the SEEG recordings used in the analysis.
- doi:10.3389/fnins.2020.577574
Cited by
3 publicationsPublic catalog entries on Sciscape.
- supportsShared gaps increased power shift test rejection in independent controls with spectra from 35 SEEG records
The new power-gap benchmark supports its warning that a shift after shared processing can fail to test independence of the source signals. It uses a different mechanism and does not reproduce the delayed shared-contact experiment.
- usesSEEG rings recovered simulated constant integer output delays from -2 to +2 samples in eight records. Mean recovery was 99.46% with 1-second calibration, 5% independent Gaussian noise, and equal gains
Used source metadata, pinned EDF range provenance, initial retrieval code, and the inherited eight-record four-contact cohort. Its simulated output-delay result motivated the new closed-ring delay-recovery test. Native source ranges were downloaded again. The parent null-test endpoint was not reproduced.
- usesA 1 ms constant delay bound kept about 95 percent of mean estimated gamma scores in two SEEG rest records
Used its analysis of shared-contact spectra and simulated delay to design the analytic null check. The new measured-magnitude phase controls use a different spectral recipe.