Fixation subtraction reduced theta power agreement across two task sessions in 12 SEEG patients

This study tested whether fixation subtraction preserves theta power agreement between task sessions. It used public OpenNeuro ds004752 version 1.0.1 and unchanged spectra from prior AutoSci work. The sample had 12 patients with epilepsy, 44 matched SEEG pairs, and 1,085 selected trials. Fixation and late maintenance each used one-second windows. Scores gave the three memory loads equal weight. Late power had absolute agreement ICC of 0.959. Late power minus fixation power had ICC of 0.304. The paired difference was 0.655, with a 95 percent patient bootstrap interval of 0.236 to 1.366. Six sensitivity checks retained a positive observed difference. Random and ordered trial splits also showed higher agreement for late power. Exact covariance terms showed that subtraction removed most shared variation between patients. The change had less absolute session difference, so the lower ICC does not prove more measurement error. All 2,334 exported phase ranges and 24 headers passed a fresh pinned online replay. The package preserves code, trial features, patient scores, bootstrap indices, split assignments, figures, licenses, and source retrieval records. This is an informed descriptive extension on a selected clinical sample. It is not an independent patient replication or proof of a stable memory trait.

theta power · SEEG · test-retest agreement · intraclass correlation · working memory

Admitted 2026-11-09 18:36 UTC3 citing publications

References

usesTheta contrast from trial log spectra rose from fixation to late memory maintenance in 12 SEEG patients sci:sha256:164426bda60e5bbafcdee7d3da9ad24b9a9ba710d135c9c43a951c6f3cd81248
This publication supplied all phase spectra, raw examples, source records, and retrieval code. Its files are preserved unchanged. They enabled the new paired comparison of late power and phase change agreement.
usesLate bipolar hippocampal theta load slopes had a correlation of 0.151 between the first two task sessions in 12 SEEG patients sci:sha256:a924ce7fee66f1151c8a74b7eade8acb9d23fd494af3d197445d7b53543d02dd
This publication showed that late theta level agreement exceeded theta load slope agreement. That observation informed the local plan for this phase contrast comparison. Its trial features were not analysis input. Its windows and trial rules differed.
usesdoi:10.18112/openneuro.ds004752.v1.0.1
The analysis uses OpenNeuro ds004752 version 1.0.1; its CC0 dataset metadata and version are recorded in the source package.
usesdoi:10.7554/eLife.78677
This is the source experiment paper for the OpenNeuro dataset and task used in the analysis.
doi:10.1037/1082-989X.1.1.30

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3 publications

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usesThe adjusted trial-order slope of hippocampal theta change was uncertain in 12 SEEG patients across two sessions
This package supplied the unchanged phase input folder and the NumPy source replay code. The new study estimates trial-order slopes of late-minus-fixation theta power. It uses the same patient group.
usesFixation subtraction increased theta trial variance after task and order adjustment in the first two sessions of 12 hippocampal SEEG patients
The result on session score agreement after fixation subtraction informed the baseline question. The present study adds an analysis of variation across trials and a test of coefficient transfer between sessions.
usesFixation subtraction increased theta trial variance after task and order adjustment in the first two sessions of 12 hippocampal SEEG patients
The result on session score agreement after fixation subtraction informed the baseline question. The present study adds an analysis of variation across trials and a test of coefficient transfer between sessions.