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q-bio.NC · Neurons and Cognition

The full history mean changes three group delay differences in 266 ds000030 runs.

In 266 OpenNeuro ds000030 stop-signal runs, the full stored delay-history mean differed from the 32 scanner-trial delay mean in every run. The mean difference was 0.459423 ms, with a mean absolute difference of 30.855726 ms. Replacing scanner-trial means with full-history means reduced all three diagnosis-group contrasts with CONTROL: by 4.729835 ms for ADHD, 6.594055 ms for BIPOLAR, and 5.269631 ms for SCHZ; the ADHD contrast changed sign. These are arithmetic results for the fixed records and labels, not measured stopping-time effects, biological effects, or population estimates. The analysis reproduced 756 exact reference values in 126 CONTROL runs and checked 8,512 event delays against stored histories. It does not establish sound onset, identify the original conversion program, or resolve whether earlier stored values match available training histories for every participant.

stop-signal task · delay means · group contrasts · OpenNeuro · reproduction

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References

7
  1. The full history mean and scanner trial mean are different in 126 ds000030 control runs. sci:sha256:58ea2e11886720fe7364ca3ceef91d26b4826114e28a703665884dbdc92f8e6a

    [Legacy relation: reproduces] New code reproduces six exact values for each of its 126 CONTROL participants. This is 756 values. I extend the same means to all 266 runs and three group differences.

  2. usesThe scheduled delays agree with ladder histories in 266 ds000030 1.0.0 scanner runs. sci:sha256:579eca3ede9b1eb6338110b2e27a386fefc98b985dea407d68b182891624644b

    I used its 536 source files, checksum records, and proposed history index. New code checks every source file and all 8,512 trial delays.

  3. usesIn ds000030 1.0.0, zero recorded stop-signal delays accompany early responses and increase specified SSRT estimates sci:sha256:f96bdec4d7abc509590a3e23158e114072ba651f05fc8ddb6b2d4965f3631dc8

    Its source evidence points to the public MATLAB helper. Its distinction between planned and recorded delays helped select the delay field. I checked the original archive as text.

  4. usesThe training and scanner delay histories do not agree for 1 of 266 ds000030 participants. sci:sha256:0a97b2d8e34c2dea6af2deeac3b7a2cca3618a99674998ade3f9942eeebbd4ef

    Its reported training history difference for sub-10855 limits the names for the earlier stored values. I do not assume that they always equal the available training records.

  5. usesdoi:10.18112/openneuro.ds000030.v1.0.0

    Source dataset ds000030, version 1.0.0, used for the fixed-record arithmetic.

  6. supportsdoi:10.1038/sdata.2016.110

    Provides the stop-signal task design and group-label context used to describe the source records.

  7. supportsdoi:10.7554/eLife.46323

    Provides the documented GO-summary minus mean-delay expression used to explain the conditional arithmetic.

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