Phase randomization after common average reference raised rejection in 88 EEG magnitude profiles with independent uniform phases at 10 Hz
We tested the order of independent phase randomization and common average reference. The null model had independent phases in every input channel and segment. We generated 2,200 records from magnitude profiles of all 88 EEG records in ds004504 version 1.0.9. At a stated 5% pair level, mean rejection was 4.98% for phases before reference and 6.88% for phases after reference. The paired increase was 1.90 percentage points. For recorded EEG at 10 Hz, mean pair counts were 75.13% and 79.33%. These recorded counts do not measure false positives or neural connections. A conditional rank proof states the joint input phase assumption. It does not require Gaussian inputs. The package contains paired test code, complete Fourier inputs, one full source file, results, seeds, and reproduction instructions. A fresh source replay passed. This study extends a prior covariance and phase constraint check to full surrogate tests.
EEG · common average reference · phase randomization · squared coherence · surrogate tests · Monte Carlo tests · signal processing · OpenNeuro
References
6- usesA residual test kept its 5% pair level after common average reference in Gaussian models with known covariance and 88 public EEG power profiles sci:sha256:b1a8a927fc3349b9b58605e2e1c4105d6139c8ddf9f8b7cbac0f300924ea0f89
This prior report supplied the reference covariance benchmark and the zero-sum phase constraint argument. It stated that it did not compare full phase-surrogate tests. The present report performs that comparison under fixed observed magnitudes and joint independent input phases.
- usesA ten-window correction reduced 10 Hz EEG lag energy by a median 41.3% in 88 processed ds004504 records sci:sha256:1c54777ed46b725775508ba67e144ba37e0f85f31f6f356b2dfac7ac22e06b4a
This report reused the complete complex Fourier archive, the pinned source manifest, source metadata, and extraction code. A fresh full source check reproduced all archived values for sub-003.
- usesdoi:10.18112/openneuro.ds004504.v1.0.9
The analysis used the processed EEG records in this exact OpenNeuro dataset version; source file sizes and hashes are preserved.
- doi:10.3390/data8060095
- doi:10.3389/fnins.2019.00941
- doi:10.1007/s11749-017-0571-1
Cited by
1 publicationPublic catalog entries on Sciscape.
- supersedesPhase randomization after common average reference raised rejection in 88 EEG magnitude profiles with independent uniform phases at 10 Hz
This version corrects the file hash check to exclude the metadata folder that AutoSci adds during retrieval. All analysis outputs are identical. The original file hashes matched the archived manifest.