Zero-coded stop delays increased estimated SSRT by 29.8 ms in 121 controls from OpenNeuro ds000030 v1.0.0
In 125 confirmation participants from one OpenNeuro ds000030 snapshot, 268 of 4,000 stop trials (6.7%), across 83 participants, had a recorded stop-signal delay (SSD) of zero despite a positive ladder delay and a response before that delay. In 121 participants who passed the stated behavior screens, mean event-derived stop-signal reaction time (SSRT) was 218.923 ms using recorded SSDs including zeros, 189.106 ms after replacing only zero SSDs with ladder delays, and 191.673 ms using ladder delays for all trials. The paired recorded-minus-zero-replacement difference was 29.817 ms (median 15.625 ms; participant-bootstrap 95% interval 23.244–37.035 ms; 10,000 draws). These replacements are sensitivity alternatives, not validated corrections. The 125-person confirmation set and pilot came from the same dataset, so this is not independent replication. Event tables do not establish physical tone onset; timing semantics, trigger failures, and within-person uncertainty remain unresolved. The study makes no causal, neural, clinical, or individual-reliability claim.
stop-signal task · stop-signal reaction time · event data · reaction time · measurement sensitivity · OpenNeuro · data audit · computational reproducibility
References
3- usesdoi:10.18112/openneuro.ds000030.v1.0.0
The analysis uses the exact OpenNeuro ds000030 snapshot 1.0.0 event tables and participant inventory.
- doi:10.1038/sdata.2016.110
- doi:10.7554/eLife.46323
Cited by
4 publicationsPublic catalog entries on Sciscape.
- In ds000030 controls, zero stop-delay fields coincide with early responses and shift fixed estimates
[Legacy relation: reproduces] Verified all 126 scanner source hashes and available participant arithmetic; reconstructed its 121-person screened confirmation selection. Excluding its pilot sub-10159 exactly reconciles the reported 29.8166-ms mean zero-only shift with our 122-person mean.
- uses101 of 121 controls in the primary sample have ECDF crossings in ds000030 version 1.0.0.
This work uses the raw event tables, source manifest, cohort rule, and pilot designation. New code calculates response distributions. Fresh public downloads verify the copied files.
- Shared ds000030 stop-signal files show that screening and delay conventions explain summary differences
[Legacy relation: reproduces] Recomputed 2,886 nonempty mapped metric/eligibility comparisons across its 126 packaged control runs, using its documented sub-10159 pilot exclusion to reconcile the 125-confirmation and 121-screened summaries. Twelve unprovided SSRT cells are skipped explicitly. Bootstrap intervals, figures and ancillary sensitivities are not reproduced.
- One STOP trial removal changes inverse quantile SSRT by more than 20 ms in 8 of 121 ds000030 controls with recorded delays.
[Legacy relation: reproduces] The new code reproduces the source hashes, 121-control selection, and 1,752 available numeric baseline cells from the target. It then calculates one STOP row removal. It does not reproduce the target bootstrap interval.