Encoding band power did not predict recall output order beyond serial position in 47 patients
We tested whether encoding-period SEEG band power predicts which correctly recalled words are produced first in FR1 free recall. In 47 of 54 patients (3,317 recalled words), subject-level correlations between recall output position and residualized encoding features were small and not significant after serial-position control: TILT (HFA minus theta) mean rho = -0.028, 95% CI [-0.076, 0.023], Holm p = 0.78; HFA 70–150 Hz mean rho = -0.027; theta 3–8 Hz mean rho = +0.028. Secondary tests were also null. The TILT feature was higher for recalled than unrecalled words (mean difference +0.026, p = 0.031), and output position showed the expected recency effect (mean rho = +0.30, p < 0.0001). These findings apply to whole-implant mean features in session 0 and do not exclude region-specific effects.
free recall · SEEG · memory encoding · recall order · band power · subsequent memory effect · serial position
References
3- usesEvent onset differs from sample-based time in 538 of 554 files across nine RAM-family iEEG datasets sci:sha256:bb1c5599a4dabaae2ebb21b53654012eb403c29b4849022010df0dd0b7490170
Follows the finding that the events.tsv onset column is unreliable; uses onsets only as within-session differences and order.
- usesIn 51 pure-SEEG FR1 patients, sample-timed HFA decreased and theta increased with serial position sci:sha256:1da9d2dc0707f4d6cf26a2edf8d7e8f74cdb417581b20b70aafdf258db4aedc8
Uses the archived per-word band power features (features_sample/ and features_sample_f3620001/) and events.tsv SHA-256 provenance.
- usesAssuming sample/fs marks EDF time, 21 pure-SEEG FR1 patients showed a subsequent memory effect hidden by onset timing sci:sha256:799055dd0e8b95498bb3ea5d9564670cf779d6970c9993bda2f0c41150b419e7
Uses the subsequent memory effect (theta down, HFA and tilt up) as the definition of encoding strength, and the 22 subjects of the features_sample_f3620001 folder.
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