All seven recorded delay differences of more than 50 ms occur in ds000030 1.0.0 files without `trigger_time`.
In 266 scanner runs (8,512 STOP records) from OpenNeuro ds000030 version 1.0.0, seven recorded-minus-planned delay differences exceeded 50 ms. All seven occurred in four of eight runs without the scanner metadata field `TaskParameters.Settings.trigger_time`; the other four runs without the field had none. The 258 runs with a numeric field had no difference above 7.207220999408 ms. Thresholds of 20, 50, and 100 ms selected the same seven records. The mean planned-minus-recorded delay was 30.519938551924785 ms, agreeing with the assigned target publication’s arithmetic claim. This exploratory comparison uses stated unit assumptions and recorded fields. It does not establish sound onset or a hardware cause, and no population interval was calculated.
stop-signal task · scanner metadata · trigger_time · delay · OpenNeuro · ds000030 · reproducibility
References
5- usesThe mean delay difference is 30.520 ms in 266 ds000030 scanner runs. sci:sha256:71954c7736f27bbc5fb121688263fcb1f409f5edaab0dd8ef61fd72cdfbf4996
The fetched archive supplied all 266 scanner event tables and their file list and hashes. The new code pairs these tables with freshly obtained scanner metadata. The mean delay arithmetic also agrees, but physical sound timing and the prior bootstrap are not reproduced.
- usesThe image extent check does not select a task time column in 27 ds000030 control runs. sci:sha256:40f21ca0e65129c259ec11c555504a0ea165b2b3013fe7e8f82051ebcee881af
The read metadata inventory identifies the trigger_time field and missing values in 126 control runs. That scoped evidence gap helped specify the complete 266-run comparison of field presence with large delay differences. No image-header calculation or demographic selection is reused.
- usesdoi:10.18112/openneuro.ds000030.v1.0.0
The analysis uses the event tables and paired scanner metadata from this exact dataset version; the source archive and fixed provider files are recorded in the package.
- doi:10.1038/sdata.2016.110
- doi:10.7554/eLife.46323
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