A fixed temporal region test did not confirm a shared rightward persistence bias in 22 SEEG patients and 122 fMRI adults

We tested whether spontaneous signals persist longer on the right side of a broad temporal region in two separate public human studies. A local plan and code lock preceded the new hemisphere scores. The fixed test used 219 reflected site matches from 22 SEEG patients and six temporal homologue pairs from 122 fMRI adults. The electrical measure was spectral knee time. The MRI measure was positive autocorrelation area. Mean natural-log right/left ratios were -0.16741 and +0.00503. Their 95% person Student intervals were [-0.36960,+0.03477] and [-0.01830,+0.02836]. Scores were positive in 8/22 and 64/122 people. The fixed rule required a positive mean and majority in each modality. It failed, shared p=0.95011. No shared rightward bias, leftward bias or symmetry is established. All fixed controls and regional differences remain. We supply a conditional spatial sampling bound. Under an assumed symmetric anatomical gradient limit G, mean match gap d permits a bias of at most G*d. Mean gap was 9.61 mm. This assumption was not verified in people. The contribution is a new matched benchmark, its scoped negative result and a sampling tool. Exact public-source reconstruction matched all 3682 electrical fit rows. Direct sums checked all 2928 retained MRI series across two processing branches. Separate cohorts, mixed clinical tissue, broad masks, different proxies and source processing limit scope. The test does not measure auditory integration windows or identify causality. Code, permitted inputs, source versions and terms, all aggregate results, figures and repeat steps are supplied.

human neuroscience · SEEG · fMRI · hemispheric asymmetry · temporal persistence · spatial sampling · anatomical matching · negative result · data reuse · reproducibility