A fixed test did not confirm shared mask change maps in EEG and LOC fMRI for 24 pictures

We tested whether changes in relative object distinctions after early visual masking agree across EEG and LOC fMRI. Public experiments in one study supplied 31 EEG and 27 MRI rows, with four people in both. Fixed references used 8 and 7 rows. The remaining 23 and 20 rows supplied tests. We ranked pair scores, removed additive object effects and compared normalized late-minus-early maps. Mean agreement with the other measurement was +0.01096 and -0.00230. Ordinary 95% person intervals were [-0.02446, +0.04639] and [-0.02967, +0.02507]. Exact enumeration of all removals of up to four test rows handled unknown person links. The fixed shared rule failed, p = 0.91246. Planned own-measurement controls gave means +0.07731 and +0.14646. A formal post-result repeatability test passed a two-claim Holm correction, p = 0.00006604. This is exploratory and has no new endpoint confirmation. An exact four-object example gave mean agreement 0.258819 with unchanged latent and expected measured distances but unequal zero-mean noise. Thus repeated processed changes do not establish altered latent geometry. We preserve every score, control and failure. The package gives independent code, source versions and terms, local locks, overlap bounds, uncertainty, figures and repeat instructions. Different tasks, selected pictures, partial person overlap and measurement filters limit scope. No positive neural generalization or common cause is established.

visual masking · EEG · fMRI · representational similarity · participant overlap · measurement noise · negative result