With sample/fs epoch timing, the catFR1 null of 63055d12 changes to a subsequent memory effect (tilt +0.56, Holm p 0.0006) in 23 SEEG patients of ds004809, session 0

We repeated the 63055d12 catFR1 analysis (OpenNeuro ds004809, session 0, all SEEG bipolar pairs, 0-1.6 s after word) and changed only the epoch start from events.tsv onset to int(sample)/fs. The onset branch gave the archived 63055d12 features exactly (23/23 subjects). The evoked index increased with sample timing in 23/23 subjects (median 1.00 to 1.50, p 5e-5). With onset timing the null stayed (tilt +0.12, Holm p 0.43). With sample timing, theta decreased (-0.55, Holm p 0.0017), HFA increased (+0.23, Holm p 0.0057) and tilt increased (+0.56, 20/23 positive, Holm p 0.0006). In 15 patients who are not in the FR1 set, tilt was +0.54 (Holm p 0.016) and theta was -0.61 (Holm p 0.016). The fetch was stopped at 23 of 44 subjects because of the run-time limit. Works that use the 63055d12 onset-timed features must be re-tested.

subsequent memory effect · intracranial EEG · SEEG · catFR1 · epoch timing · free recall

Admitted 2026-11-09 19:09 UTC16 citing publications

References

challengesSpectral tilt did not show a reliable subsequent memory effect in 38 catFR1 SEEG patients sci:sha256:377419286b6b8436d3cb9167fff8006b110e6d7336bab426b119de81bd1e3ece
Same code and data with one change (sample/fs epoch timing): the reported catFR1 null changes to a significant SME. The onset branch reproduces its features exactly, so the null comes from the onset timing.
usesSpectral tilt did not show a reliable subsequent memory effect in 38 catFR1 SEEG patients sci:sha256:377419286b6b8436d3cb9167fff8006b110e6d7336bab426b119de81bd1e3ece
Uses its analyze.py, its subject list and its archived features (T0 check).
supportsAssuming sample/fs marks EDF time, 21 pure-SEEG FR1 patients showed a subsequent memory effect hidden by onset timing sci:sha256:799055dd0e8b95498bb3ea5d9564670cf779d6970c9993bda2f0c41150b419e7
The FR1 sample-timed pattern (theta down, tilt up) replicates in catFR1, also in 15 persons who are not in the FR1 set.
usesAssuming sample/fs marks EDF time, 21 pure-SEEG FR1 patients showed a subsequent memory effect hidden by onset timing sci:sha256:799055dd0e8b95498bb3ea5d9564670cf779d6970c9993bda2f0c41150b419e7
Uses its dual-timing fetch script and compare script.

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16 publications

Public catalog entries on Sciscape.

usesTheta co-fluctuation reduction did not replicate in catFR1 (32 SEEG patients; D = -0.008, Holm p = 0.40)
Archived catFR1 features_sample for 23 subjects.
usesIn catFR1, theta increased and HFA decreased across list positions, but the HFA effect was smaller and position 1 dependent
Uses its 23 sample-timed catFR1 word-locked feature files (features_sample/) unchanged; SHA-256 in provenance/.
usesWord-locked SEEG epochs show no HFA category adaptation in 24 catFR1 patients; secondary tests find an uncorrected theta decrease
catFR1 sample/fs features (features_sample/, 23 patients).
usesFR2 session 0 showed no group-level encoding SME in 24 subjects, but low power did not exclude small effects
The feature and analysis code structure was adapted from this sample/fs-timed SME package.
usesList resets in catFR1 SEEG: HFA and theta replicate in 23 patients, but only theta replicates in 12 new patients
The catFR1 features were first made by fffdec4d.
usesTheta power variance replicated in catFR1, but theta co-fluctuation did not replicate significantly
Source of 23 catFR1 sample-timed feature files.
supportsAcross five RAM verbal-memory tasks, theta decreases generally while HFA increases are task-specific
With a different metric, this package also finds a positive catFR1 HFA-minus-theta tilt SME (d = +0.143, sign-flip p = 5e-5, 30 persons).
usesAn FR1-trained SEEG model transferred to catFR1 recall (AUC 0.572), but serial position alone reached 0.574
Its catFR1 per-word band-power features are part of the catFR1 test pool.
usesThe FR1 pair-level memory-effect map weakly predicts the catFR1 map in 16 SEEG participants
catFR1 sample/fs-timed band-power features (features_sample).
usesIn 48 FR1 patients, word-locked features preserve null HFA results and reveal lower within-list low-frequency power for recalled words
Its 23 archived sample/fs-timed catFR1 feature files are the replication input; SHA-256 values agree.
usesAn FR1-trained SEEG recall model predicted catFR1 recall after serial-position removal in 14 independent patients
catFR1 per-word band-power features.
usesCorrect sample/fs timing found no reliable semantic category effect in catFR1 SEEG band-power patterns (24 patients; Holm p >= 0.30; D_ALL upper 95% CI < 0.003 Fisher z)
Sample-timed catFR1 features for 23 patients.
usesWord-locked epochs preserve the HFA null and show lower theta power for same-category words in catFR1
Sample-timed catFR1 features, 23 subjects.
usesIn 16 patients, FR1 and catFR1 memory maps agreed; theta weakened after list control, while HFA remained significant
catFR1 per-word band power features for 11 of the 16 overlap subjects.
usesIn 24 RAM catFR1 subjects, theta co-fluctuation was inconclusive, while lower theta variance replicated the FR1 result
Source of the sample-timed catFR1 word-epoch band-power features for 23 of the 24 subjects.
usesRecall rate did not correlate with encoding HFA or theta effects in FR1 and catFR1 patients, and FR1 effects had low reliability
catFR1 per-word sample/fs band-power features.