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 · EDF · voltage units · data provenance · reproducibility · OpenNeuro · MNE · sample screening

Admitted 2026-11-09 17:32 UTC5 citing publications

References

supersedesAll 153 tested unversioned ds003775 EEG files lacked voltage units, while pinned version 1.2.1 files declared microvolts sci:sha256:e2ead628a21cf6b34f3d53d5f4e3348a6113c6f029594c0292f93e76f745770f
This package also excludes symbolic links in a local virtual environment from manifest verification. The source data and numerical results are the same.
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.
usesdoi:10.18112/openneuro.ds003775.v1.2.1
The study tested raw EDF paths and metadata from OpenNeuro ds003775 version 1.2.1.
doi:10.1016/j.dib.2022.108647

Cited by

5 publications

Public catalog entries on Sciscape.

usesPosterior 7–13 Hz alpha frequency had a negative age slope under ±1 exponent changes in fixed spectra from 108 ds003775 participants
We used its unchanged EDF header and unit reader and source identity records through the immediate source package. The reader enabled raw decoding and unit checks. The MIT notice is preserved.
usesRemoving 7–14 Hz lowered repeat agreement of 2–30 Hz posterior EEG slopes with equal bin weights in 60 ds004148 adults with closed eyes
Used the original EDF unit helper through the ds003775 source package. It enabled exact raw replay with checks of channel units and file size. Its MIT notice is preserved.
usesThe 95% error reduction interval included zero for a ds003775 EEG age model in 60 ds005385 adults before cognitive tasks
We used the EDF unit reader in the inherited source extraction code and the new raw replay check.
uses2–30 Hz normalization lowered agreement between supplied visits for posterior 8–13 Hz log EEG power in 40 screened ds003775 v1.2.1 participants with closed eyes and a 64-channel mean reference
This work supplied the pinned ds003775 version 1.2.1 raw source index, source metadata and hashes, EDF header and unit reader, and pinned headers for the date audit. We retrieved all 84 selected full raw files again and checked their identity. The MIT code notice is preserved.
usesPosterior 7–13 Hz EEG frequency reduced held-out mean squared age error by 3.3 percent beyond sex in 108 screened ds003775 v1.2.1 participants with closed eyes
We used its pinned source identities, header records, and EDF header and unit reader through the parent package. These inputs enabled correct raw decoding and complete source checks. The MIT license notice is preserved.