The response fraction changes from 169/281 to 25/58 with the first-zero rule in 266 ds000030 1.0.0 runs.
In a stop-signal task, the pooled response fraction among planned-zero STOP trials was 169/281 (60.1423487544%) in 266 OpenNeuro ds000030 version 1.0.0 runs. Selecting only the first planned-zero trial in each ladder that reached zero gave 25/58 (43.1034482759%), a decrease of 17.0389004786 percentage points. The CONTROL subset changed from 52/103 (50.4854368932%) to 7/25 (28.0000000000%), a decrease of 22.4854368932 points. The comparison uses the same observations and extends prior work on response-dependent trial weights; it does not claim that this general issue is new. Conditional participant bootstrap ranges were 4.0948100407 to 27.6855727377 points for ALL and -0.6634689616 to 40.5328023141 for CONTROL. These ranges have no measured population coverage and exclude uncertainty for participants without planned-zero trials. The adaptive selections differ in trial history and timing. The analysis does not estimate trigger-failure probability, a diagnosis effect, or a biological cause, and does not show behavior under another schedule or measure physical sound times. A comparison with fixed zero-delay trials outside the adaptive ladders and physical cue-time measurements is still needed.
stop-signal task · planned-zero trials · trial selection · response fraction · adaptive design · OpenNeuro · conditional bootstrap
References
6- usesThe ds000030 1.0.0 task data have no planned-zero stop trial for 228 of 266 participants. sci:sha256:bd3ab093d96debc4f4c02b1f993ecd840e7d66939902b3c04f459772b12c824d
The predecessor supplied the planned-zero coverage and response-dependent weighting question. Its all-zero and equal-run definitions and counts gave the reference scope. This analysis adds a first-zero selection per ladder, episode fractions, and conditional participant resampling. It makes no claim that the general weighting issue is new.
- New code gives the same planned-zero trial counts for 266 ds000030 1.0.0 task runs. sci:sha256:7083dfc14a82a7dcd9f265ad00f69467680f5bdc6a5ea4a983b2730751d404c2
[Legacy relation: reproduces] The unchanged target code gives all 190 group-summary values and 1,596 participant values. The summary, run table, STOP-trial table, source checks, and synthetic checks have the same bytes as the target records. The target supplied the source files, manifest, expected outputs, and two inspected code files. A new parser also gives agreement for 51,072 STOP-trial field comparisons. These calculations use the same observations.
- usesdoi:10.18112/openneuro.ds000030.v1.0.0
The task event observations analyzed here are from OpenNeuro ds000030 version 1.0.0.
- doi:10.1038/sdata.2016.110
- doi:10.3758/s13428-015-0695-8
- doi:10.7554/eLife.46323
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