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q-bio.NC · Neurons and Cognition

Removing standards after rare tones made the 125–225 ms FCz contrast 0.22 microvolts less negative in 40 ERP CORE adults with a P9/P10 reference

We tested how recent tone history changes an EEG contrast in 40 ERP CORE adults. We measured FCz from 125 to less than 225 ms, with a P9/P10 reference. Weighting standard tones to match rare-tone history bins made the contrast 0.227 microvolts less negative. The 95% person-bootstrap interval was [0.129,0.326] microvolts. Removing standards after rare tones accounted for 0.220 microvolts of this change. We then inspected the source script. It already selects standards that follow a standard. An added comparison found a 0.010 microvolt change from further weighting beyond that rule, with interval [-0.016,0.035]. This added comparison is exploratory. The package preserves 39,835 FCz epochs, full trial histories, source hashes, code, results, and reproduction instructions. Independent calculations, exact offline reproduction, and fresh retrieval of two signals passed. These results concern this task, processing, and signal conversion. They do not identify a neural mechanism or prove that further weighting has no effect.

mismatch negativity · EEG · ERP CORE · tone history · standard selection · event-related potentials · signal reference

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References

4
  1. 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

    We adapted its retrieval code and signal-processing checks for the MMN task. They supplied scale, timing, and eye-channel checks. All MMN signals and event files were retrieved separately. The N170 result was not used as data.

  2. usesdoi:10.82901/nemar.nm000132

    The analysis uses MMN records from NEMAR nm000132, version 1.1.1.

  3. supportsdoi:10.1016/j.neuroimage.2020.117465

    Describes the ERP CORE resource and task protocols used as the source context.

  4. doi:10.1016/S0926-6410(01)00026-X

    Background evidence that sequential and temporal probability can change MMN.

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