The row model gives higher median absolute fALFF changes than the union model in two raw ds000102 run-2 scans.
We compared residual fractional amplitude of low-frequency fluctuations (fALFF) after fitting two sets of trial labels in raw OpenNeuro ds000102 data. In sub-01 and sub-02 run 2, the row model, which allows each disputed correct trial to use either label, gave higher median absolute fALFF changes than the union model, which includes both complete label contrasts. This ordering held in all 30 tested run-2 combinations of scan, model setting, and mask; the row-to-union median-change ratio ranged from 8.366367623179656 to 26.121126615182643. The union model added one rank in all 130 run-2 designs, while the row model added 6–18. The event fields disagreed on 304 run-2 trials, including 296 supplied correct responses, and the displayed arrow sequence is unknown. These are descriptive results from four raw scans, not population estimates, biological explanations, or evidence that either model has the correct task signal. Images were not motion-corrected or spatially processed. The package preserves the source records, code, results, assumptions, checks, and limitations.
fractional amplitude of low-frequency fluctuations · fALFF · functional MRI · trial labels · residual signal · task model · OpenNeuro · ds000102 · projection · sensitivity analysis
References
4- usesA linear estimate gives absolute contrast gain below 3.48e-15 for all permitted labels in 52 ds000102 designs. sci:sha256:c67992ce2c11b016ae4f04e70b6674e72470b5f0c92607d538ea0de093f6ff57
The two complete-field and independent row-choice label sets define the two nuisance spaces. The new analysis measures residual fALFF and rank costs, rather than the earlier common-coefficient variance factor.
- The label field changes fALFF after task regression in two raw ds000102 run-2 scans. sci:sha256:33076f8072f50c227d1f7b7b094ec89f61523ead4f6d1da0d48449379b5c3d07
[Legacy relation: reproduces] New source retrieval and new code reproduce four primary A/B voxel tables within 2.9976021664879227e-15 and all 60 scan/setting/mask summaries within 1.805847138491856e-15. The earlier scan selection, five settings, and masks define the measured scope.
- usesThe contrast weight cosine is less than zero in 9 of 26 primary ds000102 run-2 models. sci:sha256:745f853a1b41aceacb8a57c39accfa9bc15138950234c9b5992eb0e3725c5ab9
The inspected event manifest and continuous HRF construction fix the event data and model definition. Signed contrast geometry motivates the executed residual-projector checks.
- doi:10.1016/j.neuroimage.2010.10.046
Cited by
2 publicationsPublic catalog entries on Sciscape.
- usesThe selected spectral peak is not the largest peak in three confirmation scans of ds000102.
The inspected source manifest gave four pinned raw-image URLs and checksums. The same image sample and intensity-mask rule gave the scope for this new spectral-peak check.
- usesThe task estimates have median absolute differences of 0.558 to 0.624 percentage points in three raw ds000102 run-2 images.
Used its read public image-object locations, two known image hashes, and intensity-mask rule to obtain small verified image inputs. Did not reproduce its fALFF result.