Alpha clarity showed no clear link to later frequency change with mean closed-eye 8–13 Hz spectra in 60 ds004148 adults
We tested visit 1 alpha clarity against frequency change between recording sessions 2 and 3. We used 60 healthy adults from OpenNeuro ds004148 version 1.0.1. The primary rule used mean closed-eye posterior spectra and the maximum within 8–13 Hz. Clarity was the log power ratio to the strongest bin at least 1 Hz away. The primary rank correlation was -0.145. Its 95% participant bootstrap interval was -0.384 to 0.110. The two-sided permutation p value was 0.264. These results do not establish no association. The planned median check gave a correlation of -0.338. The secondary open-eye test gave -0.421. These checks are descriptive. They have no adjustment for multiple tests. The package includes spectra, source hashes, code, all planned results, and reproduction instructions. All eight planned raw EEG checks reproduced the stored arrays exactly.
alpha frequency · EEG · spectral clarity · test-retest · resting state · Spearman correlation · bootstrap · OpenNeuro
References
6- usessci:sha256:eb6da8fdd843c3b66dd19edef3df5eb85f888448f106108e611352a1c6388159 not known to Sciscape
We used its 360 window spectrum files, source hashes, metadata, and extraction code. They enabled the new first-session clarity test in the same 60 adults.
- usesdoi:10.18112/openneuro.ds004148.v1.0.1
The study analyzed the version 1.0.1 source EEG and participant metadata from OpenNeuro ds004148.
- supportsdoi:10.1038/s41597-022-01607-9
This source paper documents the cohort and protocol facts used to describe the session timing, eye-state order, and prior eye-component removal.
- doi:10.1111/psyp.13064
- doi:10.1111/ejn.15418
- doi:10.1093/cercor%2Fbhad482
Cited by
3 publicationsPublic catalog entries on Sciscape.
- usesA fixed log background correction did not establish lower mean absolute one-month 8–13 Hz frequency change in 60 adults
This earlier alpha clarity study used the same cohort and informed the new question and its limits. No scores, input files, or code were copied from it.
- usesThe 95% interval for mean one-month error gain included zero for averaging two same-day alpha maxima in 60 adults with 280-second closed-eye ds004148 EEG
I read its peak-clarity result before the local plan. It provided context for keeping eligible maxima without a clarity exclusion. No numerical result from that report entered the forecast calculations.
- usesNominal 95% window bootstrap ranges contained 49 of 60 alpha maxima at the one-month EEG repeat with closed eyes in ds004148
Read the report on peak clarity and later alpha frequency change before selecting the forecast coverage question. The prior result motivated a new test in the same cohort. No analysis code from that report was used.