Contiguous 60-second posterior alpha samples had greater mean squared error against record means than dispersed samples of equal size in session 1 of 60 ds004148 adults with closed eyes
We tested short samples of posterior 8-13 Hz alpha power in OpenNeuro ds004148 v1.0.1. The primary test used session 1 with closed eyes in all 60 adults. The target was each observed 280-second record mean of accepted four-second window dB values. Contiguous samples had 60 planned seconds and at least 48 accepted seconds. A random dispersed control used the same accepted count for each eligible start. Its expected mean squared error was calculated exactly by sampling without replacement. The geometric mean contiguous-to-control error ratio was 2.466, with a 95% person bootstrap interval of 2.044 to 2.985. Contiguous error was greater in 52 of 60 people. The conditional order test gave p = 0.0001 from 9,999 random orders. All 11 planned checks had group intervals above 1. Removing a linear trend reduced the ratio to 1.608. Separate loops checked 714 person settings. Two public raw records rebuilt exactly. A repeat run matched all nine output files. The package preserves spectra, source hashes, code, proof, results, and instructions. The result concerns these observed record means. It does not establish error against a new record, independent-reference precision, or a neural cause.
electroencephalography · EEG · alpha power · sampling error · time coverage · finite population sampling · posterior channels · record mean
References
6- usessci:sha256:eb6da8fdd843c3b66dd19edef3df5eb85f888448f106108e611352a1c6388159 not known to Sciscape
This work supplied all 360 window spectral records, source metadata, raw source hashes, and extraction code. We used those records for the exact finite-record sampling comparison and verified two extra raw replays.
- usesAlternating EEG windows gave higher posterior 8-13 Hz alpha reactivity agreement than consecutive parts in session 1 of 60 adults sci:sha256:93d0976c84160b781a4865153fa9413133091799ec5ad003898acb16b87de798
Its comparison of alternating windows and consecutive parts informed the question about time coverage. Our new test measures short-sample squared error within one state against the observed record mean, with an exact dispersed sampling control.
- usesdoi:10.18112/openneuro.ds004148.v1.0.1
The analysis uses the OpenNeuro ds004148 version 1.0.1 EEG dataset; source URLs, version, and hashes are preserved.
- supportsdoi:10.1038/s41597-022-01607-9
This dataset paper documents the source cohort and EEG acquisition described here.
- doi:10.1523/JNEUROSCI.21-04-01370.2001
- doi:10.1109/JBHI.2019.2936326
Cited by
6 publicationsPublic catalog entries on Sciscape.
- In 60 ds004148 v1.0.1 adults with closed eyes, a one-month reference reduced the ratio of continuous to dispersed posterior 8-13 Hz mean squared error with 60 planned seconds and equal accepted counts
[Legacy relation: reproduces] The separate direct calculation reproduces the published primary same-record geometric error ratio of 2.466. We used new paired bootstrap draws, so the confidence interval need not be identical.
- usesIn 60 ds004148 v1.0.1 adults with closed eyes, a one-month reference reduced the ratio of continuous to dispersed posterior 8-13 Hz mean squared error with 60 planned seconds and equal accepted counts
This publication supplied all 360 spectra, source metadata, source hashes, and extraction and replay code. It supplied the same-record sampling rule. We test its error ratio with a separate one-month target.
- usesWith mean EEG reference, the closed-minus-open alpha persistence interval was positive in ds007176 and included zero in ds004148 for 60-second records
Its comparison of adjacent and dispersed alpha samples led to the new normalized persistence question. The new study tests a different score and a separate cohort.
- usesFive time sections reduced mean sampling variance of alpha log power versus uniform random selection of 15 windows in two EEG cohorts
The earlier comparison of consecutive windows with uniform random windows motivated our new comparison against uniform random selection. We kept the 15-window primary count in ds004148 and used the complete accepted record as the fixed target.
- usesLog mean posterior 8–13 Hz power had higher agreement across one month than rank Moran scores in 60 ds004148 adults with closed eyes and four second windows
This study of contiguous and dispersed samples informed the question about time order. The present test measures rank order across the full retained window sequence and compares repeat agreement.
- usesWith mean EEG reference, the closed-minus-open alpha persistence interval was positive in ds007176 and included zero in ds004148 for 60-second records
Its comparison of adjacent and dispersed alpha samples led to the new normalized persistence question. The new study tests a different score and a separate cohort.
- usesTwo EEG sessions did not show lower one-month alpha contrast error than one at equal planned duration in 60 adults
The prior time coverage test informed the fixed half-selection checks. The present target is a separate record one month later.