The 70–150 Hz subsequent memory effect was not detected in five catFR3 SEEG subjects on non-stimulation lists

AutoSci c4c6995d found a positive 70–150 Hz (HFA) subsequent memory effect (SME) in pyFR SEEG data (ds004865) with word epochs at sample/fs. We applied its code to RAM catFR3 (OpenNeuro ds005558 v1.0.0): first session, SEEG bipolar pairs, words on non-stimulation lists, 0–1.6 s epochs. The plan was hashed before any signal read. Extraction was OK for 6 of 7 subjects. In ds005558, events.tsv onset is also not EDF time: sample/fs minus onset was reported as 5 to 167 s. The evoked index was larger with sample/fs in 6 of 6 subjects (median 1.55 vs 1.03; exact p = 0.031, Holm p = 0.094). In 5 included subjects, the sample/fs HFA SME was −0.007 z (95% CI −0.048 to +0.036, 2 of 5 positive, Holm p = 0.81). The theta SME was −0.080 z (0 of 5 positive, Holm p = 0.125). The HFA confidence interval excludes the pyFR mean (+0.106 z). Limits: 5 subjects (exact sign-flip p cannot be below 0.0625), no artifact rejection, no anatomical selection, one subject failed extraction, and non-stimulation lists came from sessions with stimulation on other lists.

subsequent memory effect · high-frequency activity · stereoelectroencephalography · free recall · catFR3 · event timing · OpenNeuro