The fixed image code correction increased 130–200 ms P7/P8 EEG prediction error on late trials in 40 ERP CORE adults

We tested a fixed image code correction for late EEG responses in 40 ERP CORE adults. The outcome was the mean P7/P8 voltage from 130 to less than 200 ms. Each test person's early category means supplied personal calibration. Population fitting excluded all records of the test person. The correction used early image responses from other people and a fixed shrinkage count of 20. Across 5,950 accepted late trials, person-averaged mean squared error rose from 24.919 to 25.135 squared microvolts. The increase was 0.865 percent. All eight planned checks also increased observed error. Shuffled image scores showed no clear matching advantage. Uncertainty ranges depended on the method. An additional approximate delete-one interval included zero. The result concerns one offline model and 160 fixed image codes. The package contains all 40 epoch files, code, source hashes, predictions, resamples, and reproduction commands. Independent calculation and a complete repeat passed. Fresh reconstruction reproduced all saved arrays for 40 people.

event-related potentials · EEG · N170 · image prediction · cross-validation · prediction error · ERP CORE

Admitted 2026-11-09 19:20 UTC2 citing publications

References

usesThe 95% interval for the previous image category effect on the 130–200 ms P7/P8 EEG contrast included zero in 40 ERP CORE adults sci:sha256:9d78add385d46b598f8808aecbf725038c83fc5944d5cb7c3a7a3227cf663b45
Uses the preserved signal retrieval and epoch extraction programs. This run reconstructed all 40 epoch files from hash-checked public signals.
usesThe 130–200 ms P7/P8 face–car EEG contrast was more negative for intact than scrambled images in 40 ERP CORE adults sci:sha256:fe5845281b94a0572724b54869197b5c3042f5e5e3ccc355cf3419f41fa30421
Uses the preserved N170 epochs, source event records, signal metadata, and image code map as direct inputs.
usesdoi:10.82901/nemar.nm000132
The analyzed signal and event records are from ERP CORE NEMAR nm000132 version 1.1.1. The source inputs are omitted because archived CC BY-SA 4.0 terms conflict with SCI distribution terms.
doi:10.1016/j.neuroimage.2020.117465
doi:10.1037/xge0000014
doi:10.18115/D5JW4R
ERP CORE resource and task materials attribution; related source program assets are externally linked and omitted.

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usesAn early baseline fit increased mean squared 130–200 ms P7/P8 voltage prediction error versus full subtraction in 20 separate ERP CORE adults under saved filters
This publication supplied all 40 saved P7/P8 epoch files, source event tables, source metadata, expected hashes, and retrieval and extraction code. We used these inputs for a new separate-adult baseline prediction test. We adapted its source replay and reproduced every saved array. We did not use its image-code correction model.
usesChanging zero padding to edge padding changed the last trial P7/P8 mean by more than 10 microvolts in 28 of 40 ERP CORE N170 records under fixed filters
Its upstream retrieval code and source provenance were present in the direct prior package. We adapted that code to obtain and hash-check every pinned N170 serving object, and checked the resulting trial features against its saved epochs.