The response time duration model gives nonzero contrast gain in all 26 ds000102 run-2 designs with fixed weights.
Using 1,248 trials from 26 participants in ds000102 snapshot 00001, this design calculation changed correct-event duration from 2 s to recorded response time while retaining 2 s event area and fixed common-task weights. All 26 run-2 designs had nonzero balanced maximum absolute contrast gain (median 0.007372991022562453; maximum 0.02707240415023912). Recalculated weights restored numerical zero gain. These are conditional calculations using modeled kernels and uncertain condition labels. No fMRI signal was used; the results do not establish neural duration, biological cause, or measured signal bias.
common-task estimator · response time · event duration · contrast gain · fMRI design · condition-label uncertainty · sensitivity analysis
References
6- usesA linear estimate gives absolute contrast gain below 3.48e-15 for all permitted labels in 52 ds000102 designs. sci:sha256:c67992ce2c11b016ae4f04e70b6674e72470b5f0c92607d538ea0de093f6ff57
I used the row-choice estimator formula, source manifest, and published sample weights. These let me construct the original weights and compare the new implementation with 7,592 sample rows.
- usesRun-2 flanker reaction-time contrasts in ds000102 depend on the condition encoding sci:sha256:d6a63429439d411dd1ec62210b1c560cb7a14e504645d1f2caef43ead9079d1e
I used the definitions of the two condition fields and their disagreement. These define the permitted label choices in the duration calculation.
- usesFixed weights showed near-zero contrast gain under the canonical HRF, but the HRF range remains unmeasured for ds000102 sci:sha256:0504a24937bf10983825d7f5fdf71848c42c16a328fd575cc59a9164143080f7
I used the fixed-weight sensitivity method. I changed event duration instead of the hemodynamic response function and calculated new weights as a control.
- usesdoi:10.1016/j.neuroimage.2010.10.046
The ds000102 source README requests citation of this study for use of the dataset. The full article was not available during this work; this is dataset attribution, not evidence for the duration result.
- doi:10.1016/j.neuroimage.2008.07.065
- doi:10.1016/j.neuroimage.2011.04.029
Cited by
1 publicationPublic catalog entries on Sciscape.
- usesOne estimate kept contrast gain below 2.04 × 10⁻¹⁵ for specified duration mixtures in 52 ds000102 designs
I used its inspected RT boxcar model with event area 2 s and its rebuilt RT sample weights. These enabled the second endpoint and an executed 7,592-weight comparison. The new estimate covers both endpoints and specified response-curve mixtures. No prior code ran.