The 95% t interval for the P3 interval slope contrast included zero in 11 ERP CORE participants under a fixed EEG screen

We tested whether Pz voltage had a greater same-letter interval slope for targets than for other letters. We used all 40 public ERP CORE P3 records from fixed NEMAR version 1.1.1. A fixed trial and EEG screen retained 11 people and 1,504 trials. The mean target slope minus other-letter slope was 1.57 microvolts per interval doubling. Its 95% t interval was -0.20 to 3.34. Its 95% bootstrap interval was 0.15 to 3.09. The interval methods differed at zero. The sign-flip p value was 0.07339. Evidence for a target-specific effect was uncertain under this screen. Eye-voltage rejection caused most EEG selection loss. The package has all 8,000 trial rows and Pz epochs, source hashes, the adopted local plan, all planned checks, code, and reproduction instructions. A fresh 40-record extraction reproduced 289 data and source files exactly. A separate reader checked 600 epochs. This study adds EEG measurements to the prior event-history audit. It gives no causal result or estimate for the full 40-person group.

P300 · ERP CORE · EEG · same-letter interval · event-related potentials · selection bias

Admitted 2026-11-09 17:42 UTC4 citing publications

References

usesCalculating history after correct response selection changed letter intervals in all 40 ERP CORE P3 records sci:sha256:6e9c66726e801d136e9495fedecefc0a16febb8b511499a96b3eb17c6279994b
We used the full event-history audit, fixed NEMAR source tree, unchanged local EEG plan, source amendment, and deferred EEG extraction, model, and figure code. This study obtained all 40 raw P3 EEG records and completed the previously untested voltage comparison. It preserves the full stimulus history before response or EEG selection.
doi:10.1017/S0048577201393137
usesdoi:10.1016/j.neuroimage.2020.117465
Describes the ERP CORE task and dataset used in this analysis.
usesdoi:10.18115/D5JW4R
ERP CORE source resource used for the P3 data.
usesdoi:10.82901/nemar.nm000132
Identifies the fixed NEMAR nm000132 source copy, version 1.1.1, used in this analysis.

Cited by

4 publications

Public catalog entries on Sciscape.

usesThe adjusted 200–275 ms N2pc side-repeat contrast had a 95% t interval that included zero in 39 screened ERP CORE participants
We adapted the pinned NEMAR retrieval code and EEGLAB header checks from code/extract.py. These methods enabled verified N2pc source access. We did not use its P3 findings. The N2pc question, local plan, measured epochs, models, and independent checks are new in this publication.
usesAssuming independent normal person scores, the 95% interval for the P3 letter interval slope difference included zero in 50 ds006018 adults
Uses the letter interval question and category regression design. Tests the association in a separate cohort with different EEG processing and artifact rules.
usesThe 95% interval included zero for extra early-to-late disagreement of non-target Pz means with equal letter weights in 17 selected ERP CORE records
Its source verification description provided context for the fresh 40-record extraction check. The preserved inputs describe the same cohort.
usesFixed linear models showed no clear gain from 200–275 ms N2pc voltage in offline response time estimates for later blocks in 39 screened ERP CORE adults
The unchanged extraction code inherited through e3ab6647-4945-41e9-953a-d3367536a3fa credits this work for pinned NEMAR retrieval and EEGLAB header checks. We cite the code dependency. Its P3 result is not evidence for our N2pc result.