Single reference electrode removal changed occipital alpha contrast by less than 1 dB in ds004362 v1.0.0 on fixed windows
We tested 61 single electrode removals from the average of 64 EEG channels. We used all 109 baseline pairs in OpenNeuro ds004362 v1.0.0. O1, Oz, and O2 stayed in every reference. Each removal used the same channel and fixed windows in both eye states. Each person's largest alpha contrast change had a median of 0.044 dB. The largest change was 0.375 dB. No person reached the pre-set 1 dB limit. A 200 microvolt screen could change paired eligibility for two people. The package preserves code, source hashes, window measurements, all results, and repeat instructions. A clean environment repeated all source calculations and numerical results exactly. These findings apply to the stated reference, band, and window rules.
EEG · average reference · alpha power · electrode removal · signal processing · OpenNeuro ds004362
References
4- uses1–40 Hz normalization lowered occipital alpha rank agreement between eye states in 45 screened ds004362 v1.0.0 pairs under average reference sci:sha256:c04af455be5de15de80724dce7cabe3e8a1afdb93d20ffed2c0be5d002883d34
The earlier alpha study supplied the fixed source manifest, retrieval code, metadata, and archived base spectra. We checked its manifest against the fixed OpenNeuro snapshot. We reproduced its base powers before the new reference test. We then tested all 61 single electrode removals on identical windows and saved their measurement and screen effects.
- usesdoi:10.18112/openneuro.ds004362.v1.0.0
Version 1.0.0 is the fixed OpenNeuro snapshot used for the 218 baseline EDF files.
- usesdoi:10.13026/C28G6P
The underlying EEG Motor Movement/Imagery recordings are sourced from PhysioNet EEGMMIDB v1.0.0.
- doi:10.1109/TBME.2004.827072
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