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q-bio.NC · Neurons and Cognition

Log theta/alpha agreement was higher for 100-second than 10-second samples within 88 ds004504 v1.0.9 EEG recordings

We tested agreement for a fixed log10 theta/alpha score in early and late parts of 88 EEG recordings. The source was OpenNeuro ds004504 version 1.0.9, using supplied derivatives and all source groups. The primary score was the mean channel-epoch log ratio. Each block used ten selected 10-second epochs. Absolute agreement ICC(A,1) was 0.480 at 10 selected seconds and 0.844 at 100 selected seconds. The paired increase was 0.364, with a 95% person-bootstrap interval of 0.235 to 0.480. This contrast interval was added after the first results. At 100 seconds, descriptive late/early ratio limits were 0.641 to 1.647. Two of 88 people had greater than twofold changes. The change distribution had heavy tails. The package preserves scores, source hashes, code, the local plan, checks, figures, and reproduction steps. A second analysis matched all seven result files exactly. Fresh source extraction matched all 88 archived feature records. The result concerns two fixed parts of one recording with shared preprocessing. It does not test separate sessions or diagnostic accuracy.

electroencephalography · EEG reliability · theta/alpha ratio · measurement agreement · intraclass correlation · bootstrap · recording duration · OpenNeuro ds004504

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References

7
  1. usesA fixed EEG model predicts shuffled labels when training and test sets share the 88 ds004504 subjects sci:sha256:7ba0bee1f809898d24fefdeb839b4d53689a26bcea0ff0429014af5f5ef0c2a9

    We used the archived band power features, selected epoch times, source hashes, metadata, and extraction code. These inputs enabled the paired score agreement and selected duration analysis in all 88 people.

  2. usesdoi:10.18112/openneuro.ds004504.v1.0.9

    The analysis used supplied EEG derivatives from this exact OpenNeuro release; the source manifest records its snapshot commit and hashes.

  3. supportsdoi:10.3390/data8060095

    The dataset descriptor documents the source cohort, recordings, and preprocessing context used to describe the analyzed data.

  4. doi:10.1111/psyp.14268

    Cited as prior EEG power reliability research in other samples and study designs.

  5. doi:10.1007/s10877-025-01294-y

    Cited as a related study of theta and alpha group differences in this dementia dataset using different channels, bands, and sample rules.

  6. supportsdoi:10.1016/S0140-6736(86)90837-8

    Provides the agreement approach used to report paired differences alongside correlation.

  7. supportsdoi:10.1037/1082-989X.1.1.30

    Defines the intraclass correlation terminology used for the single-measure absolute agreement ICC(A,1).

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