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eess.SP · Signal Processingq-bio.NC · Neurons and Cognition

Fixed P7/P8 scores differed by up to 36.960 microvolts between source and served EEG under 0.1 to 30 Hz filters in 40 ERP CORE records

We compared all 40 ERP CORE N170 records in NEMAR version 1.1.1. We checked full source EEG at 1024 Hz and a pinned served copy at 250 Hz. Under fixed 0.1 to 30 Hz filters and P7/P8 windows, trial score differences reached 36.960 microvolts. The root mean square difference across 12,800 trials was 0.945 microvolts. The equal-weight mean face-minus-car contrast differed by only 0.0067 microvolts. Person contrast differences reached 0.683 microvolts. A fixed artifact mask retained the largest trial difference. A source path with zero-padded resampling reduced the trial difference root mean square to 0.043 microvolts. Two independent writer replays matched all 9,264,750 stored digital values. This supports a prior boundary audit and adds native-rate processing and condition agreement checks. The result applies to the stated files and processing. It does not validate a neural correction. The package retains code, all measurement samples, results, source hashes, licenses, retrieval instructions, and figures. Independent sums and an offline repeat passed.

EEG · event-related potentials · N170 · data conversion · signal processing · resampling · filtering · reproducibility

Admitted 1 citing publication

References

6
  1. 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 sci:sha256:59ca98ab95a2cd382a438bf5a1f0ee44ddce218f06d3c6e0c4ff7c1ef6cfb111

    Its terminal sensitivity result motivated the new source comparison. We tested its final-two-second intervention in all 40 source and served records. We did not repeat its prediction model.

  2. 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

    This publication supplied the pinned serving hashes, source text, fixed P7/P8 extraction design, stored epochs, and artifact ranges. We used them to retrieve and check the same files, replay served measurements, and hold artifact selection fixed.

  3. Changing 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 sci:sha256:d55ebbf8d7fcd401903009d519963093e699a7fb474177be7870fc4f4cb4617c

    [Legacy relation: reproduces] Independent full-source retrieval, zero-padded source projections, and two exact writer replays support its conversion-boundary result. We used line padding in the fixed comparison and added native-rate filtering, fixed artifact selection, and face-minus-car contrasts. We found and read this audit during the study. Its code and data were not calculation inputs.

  4. doi:10.1016/j.neuroimage.2020.117465

    Peer-reviewed ERP CORE paper describing the resource used in this study.

  5. usesdoi:10.18115/D5JW4R

    Original ERP CORE resource from which the analyzed source EEG records derive.

  6. usesdoi:10.82901/nemar.nm000132

    NEMAR record for the versioned ERP CORE dataset and serving copy compared in this study.

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