Output phase tests reduced imaginary coherency rejection under independent contact phases in two public SEEG spectral benchmarks
We tested imaginary coherency with measured spectra from two public SEEG recordings. The null kept contact magnitudes fixed and drew independent contact phases. We used 112 shaft and window cases. In shared-contact pairs, the 13–30 Hz rejection rate was 2.10 percent after output phase draws. It was 4.71 percent after contact phase draws. The nominal rate was 5 percent. The paired difference was 2.60 percentage points. Its simulation standard error was 0.14 percentage points. Disjoint-pair rates were 5.25 and 5.14 percent. An exact proof shows that a shared contact changes the imaginary numerator variance. The package includes code, spectra, trial results, source hashes, and retrieval instructions. All eight spectral files rebuilt exactly from pinned raw source ranges. A seeded repeat of the first fixed beta case gave identical numerical results. The results concern the stated phase model. They do not establish biological connections.
imaginary coherency · SEEG · bipolar channels · phase randomization · null calibration · Fourier spectra · shared contacts
References
4- usesPhase tests after bipolar conversion give excess false positives under contact independence in two SEEG benchmarks sci:sha256:b0b63dc9379f8c88daeefb980bc33218267b4e513184c02a0294455f3129b8bc
Reuses eight measured Fourier inputs, the fixed contact quartet map, source metadata, and the pinned raw-data retrieval code. The new analysis tests imaginary coherency calibration and one synthetic signal under independent recorded-contact phases.
- usesdoi:10.18112/openneuro.ds005670.v1.0.0
This exact version supplies the SEEG recordings and measured spectra used in the benchmark.
- doi:10.1016/j.clinph.2004.04.029
- doi:10.1016/j.neuroimage.2022.119438
Cited by
2 publicationsPublic catalog entries on Sciscape.
- usesIndependent uniform contact and cell phases with fixed magnitudes give exact joint covariance and a five percent network error bound for fixed real SEEG montages
The exact single-edge imaginary numerator variance informed the joint covariance question. Its synthetic phase-locking construction informed the fixed signal model. No code or numerical arrays were copied from that study. This package supplies a full network covariance, a finite-sample bound, and a Gaussian network benchmark.
- usesOutput phase tests gave excess beta phase slope index flags under independent contact phases in two public SEEG spectral models
Used the prior comparison of contact and output phase tests to choose a PSI calibration question. No prior code or numerical input was reused. The present segment-averaged PSI estimator differs from the earlier pooled imaginary coherency estimator. Both studies use the same two records.