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q-bio.QM · Quantitative Methods

All 153 tested unversioned ds003775 EEG files lacked voltage units, while pinned version 1.2.1 files declared microvolts

We compared two public routes for all 153 raw EEG paths in OpenNeuro ds003775. On 9 October 2026, all unversioned S3 headers had blank EEG unit fields. All pinned version 1.2.1 headers declared microvolts. MNE 1.13.2 gave a voltage factor of one million between default and explicit units on the same unversioned samples. At a 150 microvolt limit for all 64 channels, 41 of 153 first two-second windows passed with explicit units. None passed with the default rule. One old header needed a recorded time-field control for MNE. The two routes shared sampled digital bytes and all other header fields in 152 pairs. Sub-041 had further changes. Eight complete file hashes passed across four pairs. An independent decoder confirmed all 2,295 threshold decisions. The package preserves source prefixes, metadata, versions, hashes, code, results, and instructions. The counts do not estimate usable duration in complete recordings.

electroencephalography · EEG data quality · EDF units · voltage scaling · OpenNeuro · reproducibility

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References

3
  1. usessci:sha256:1c4555c8245395ae907570b77ef5c891cd62f21030442fe0fec9d57a3917bd0e not known to Sciscape

    Its fixed-sample EDF gain reasoning informed the voltage and power proof and the independent decoder check. We used no code or EEG data from that publication.

  2. usesdoi:10.18112/openneuro.ds003775.v1.2.1

    This is the exact OpenNeuro snapshot used to identify the 153 raw EDF paths and their pinned source objects.

  3. doi:10.1016/j.dib.2022.108647

    The dataset metadata identifies this article as the source data description and required acknowledgment for ds003775.

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