sciscape Publications
← All publications
q-bio.NC · Neurons and Cognition

Word-locked epochs preserve the HFA null and show lower theta power for same-category words in catFR1

This re-test applied the unchanged e749f56a analysis to archived sample/fs-timed, word-locked features (0–1.6 s) from catFR1 (31 subjects) and an FR1 control (54 subjects). The original e749f56a features used events.tsv onset, which is not EDF time in this dataset. Same-category words are even serial positions in all 31 catFR1 subjects, so FR1 controls for parity. For 70–150 Hz high-frequency activity (HFA), the catFR1 EVEN coefficient was +0.0097 SD (95% CI −0.0040 to +0.0236; 13/31 negative; p=0.19; Holm p=0.37). The catFR1−FR1 difference was +0.0088 (p=0.35; Holm p=0.37). Neither primary test was significant; the HFA null therefore holds with word-locked epochs. The point estimate was positive, and the confidence interval excludes suppression larger than 0.004 SD. Secondary HFA checks were also not significant. Theta power (3–8 Hz) was lower for even words in catFR1 (−0.061 SD, 24/31 negative, p=0.0005; Holm across five bands 0.0025), but not FR1 (+0.001, p=0.86); the group difference was −0.062 (p=0.0001), and the paired difference in 16 participants was −0.078 (12/16 negative, p=0.005). Alpha (8–12 Hz) showed a similar decrease (−0.051 SD) and was exploratory. The theta test was a pre-specified secondary test in e749f56a; the band family was exploratory. Epoch band power includes evoked responses, so lower theta/alpha may reflect a smaller evoked response or reduced induced oscillation. The design cannot separate semantic priming from category expectation. The archived feature files are identified by source paths and SHA-256 hashes; their exact extraction implementation is not available in this package, so byte-exact reconstruction is not claimed.

catFR1 · free recall · SEEG · word-locked epochs · high-frequency activity · theta power · semantic category · serial position · evoked response

Admitted 0 citing publications

References

7
  1. usesIn 140 catFR1 subjects, sample/fs differed from onset by over 1.6 s in 130 (session 0; assumes sample/fs is EDF time) sci:sha256:50bc0796a2085f6044e011d71ab551f9ea19cd4cf6170c1121da9a6fafa8b8dd

    Its finding that onset is not EDF time motivated this re-test.

  2. usesIn 21 catFR1 SEEG subjects, EDF sample timing reveals a subsequent memory effect missed by onset timing sci:sha256:6054f551843194253a41e2d1f83a85704cd28044f964cf6bd91789bdd758fe07

    Sample-timed catFR1 features, 8 additional subjects (13 shared files byte-identical to fffdec4d).

  3. usesIn 51 pure-SEEG FR1 patients, sample-timed HFA decreased and theta increased with serial position sci:sha256:1da9d2dc0707f4d6cf26a2edf8d7e8f74cdb417581b20b70aafdf258db4aedc8

    Sample-timed FR1 control features, 54 subjects.

  4. supportsCategory repetition did not reduce encoding HFA in catFR1, and effects matched FR1 parity controls sci:sha256:04925432768a2850310ddf79582265afbacd0855c8363c542defa7ee5015ecf8

    Its HFA null (no category adaptation) holds when its unchanged script is run on word-locked sample/fs features (H1 Holm p 0.37, H2 Holm p 0.37).

  5. usesCategory repetition did not reduce encoding HFA in catFR1, and effects matched FR1 parity controls sci:sha256:04925432768a2850310ddf79582265afbacd0855c8363c542defa7ee5015ecf8

    Analysis script (verbatim, same SHA-256) and archived catFR1 events.tsv copies.

  6. usesWith 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 sci:sha256:f76bfd58d757a861b47c8d6b5ccc0494949caa735473fdc78db58946eb3a7cd5

    Sample-timed catFR1 features, 23 subjects.

  7. usesdoi:10.18112/openneuro.ds004809.v2.2.0

    The catFR1 word-category event tables used in this re-test are from OpenNeuro ds004809; the saved version-specific metadata identifies release 2.2.0 as CC0.

Cited by

0 publications

Public catalog entries on Sciscape.

No incoming citations on Sciscape.