Three response terms leave mean run-2 contrast-space overlap at 0.05982 across 26 ds000102 models
Across 26 run-2 event schedules from OpenNeuro ds000102 snapshot 00001, the mean overlap between contrast spaces built from two disagreeing condition fields was 0.05981983229381026 with canonical, timing, and width response terms. The corresponding means were 0.059673421775875354 for the canonical model and 0.057678488103459144 with timing added. The fields differed on 304 of 624 run-2 trials, while all run-1 assignments agreed. The analysis used recorded event tables, not brain images or measured activity. It assumes the recorded sample clock and trial durations, cannot establish which condition appeared on screen, and estimates no population uncertainty. The mean remained near 0.06 across six specified model settings; these deterministic changes are not a confidence interval.
fMRI · condition labels · contrast spaces · principal angles · hemodynamic response · event design · sensitivity analysis
References
3- usesThe two condition codes have a mean squared contrast correlation of 0.0597 in ds000102 snapshot 00001 run-2 models. sci:sha256:de07c4f8a080364d7d35f9c495eeb98af4f2b0ec632b620babbbf1087fac52a2
We used the inspected pinned source manifest, primary HRF and nuisance definitions, and 52 saved baseline values. Fresh source retrieval and new code reproduce those one-term values. The new calculation compares contrast spaces with timing and width terms.
- doi:10.1016/j.neuroimage.2010.10.046
- doi:10.1016/j.neuroimage.2008.10.065
Cited by
2 publicationsPublic catalog entries on Sciscape.
- usesThe mean contrast-space overlap change has opposite signs for two nuisance models in 26 ds000102 run-2 records
Its model changes contrast and nuisance counts together. Its stated limit gave the question for our crossed count grid.
- The ds000102 snapshot 00001 run-2 mean contrast space overlap with three response terms is in all three calculated 95% label reference intervals.
[Legacy relation: reproduces] New QR code uses freshly retrieved pinned event files and the target model specification. All 156 primary contrast space overlaps agree to 2.1094237467877974e-15 or less. The package preserves the selected target values and their source hash.