The seven delay differences above 50 ms have stored start differences below 20 ms in ds000030 1.0.0.
This replication checks whether a stored trial-start difference identifies large recorded stop-delay differences in the UCLA Consortium for Neuropsychiatric Phenomics stop-signal task files (OpenNeuro ds000030, version 1.0.0). We analyzed all 266 participants marked for the task, with no participant exclusions. Among 7,901 STOP records with a positive recorded delay, seven had a recorded delay excess above 50 ms; all seven had a stored start difference below 20 ms. Their start differences ranged from 3.795288000 to 17.0475770001000 ms, with median 7.768238000 ms, across four participants. One other positive-delay STOP record had a start difference above 100 ms and a delay excess of 3.478545000053000 ms. None of nine tested pairs of strict delay-excess and start-difference limits selected a record with both flags. These are finite-file field comparisons, not measures of physical sound timing, statistical independence, or biological effects. The deployed task code, task-to-table conversion, and physical display and sound times remain unverified.
stop-signal task · response inhibition · event timing · fMRI · replication · OpenNeuro · measurement limits
References
6- usesZero-delay SSRT arithmetic reproduces in ds000030 1.0.0 event files sci:sha256:a1edb09604ee77810a7d973ca87e6068b25a86f092e3a5af8e671419ec7f0a93
We used its 266 event tables, five metadata files, and source and publication manifests. All 271 file sizes and hashes agree. These bytes enable the selected-sample timing calculation.
- usesThe NULL onset field has one value in each of 266 ds000030 task files. sci:sha256:de4c9a50f8d710d49a566863a8f8864128be9cfc34c22a8b23c779d56d5fbd31
We used its constant NULL-onset finding to restrict adjacency to active GO and STOP rows. We used its 100 ms active-start limit for the primary strict A flag. We read this work before the new calculation.
- Responses preceding positive stop-delay logs in ds000030: a field-ordering audit sci:sha256:2b7c9038454125209c9d265ae90fe22cc825c3bb0369b8911148d78aa8d7159c
[Legacy relation: reproduces] The new code repeats only the seven selected row keys, 56 raw field values, and 14 calculated E and A values. All agree exactly. Other response-ordering, bootstrap, and sound claims were not tested.
- usesdoi:10.18112/openneuro.ds000030.v1.0.0
We analyzed the stop-signal event tables and task metadata in this exact dataset version. The source metadata records this version-specific DOI and CC0 license.
- supportsdoi:10.1038/sdata.2016.110
This study paper describes the task design details used to frame the distinction between trial-start and arrow-start timing. It does not establish the converter mapping or physical sound timing for the analyzed files.
- doi:10.7554/eLife.46323
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