At 24 selected sites, a fixed test did not confirm a shared response and repeat variation link in SEEG and fMRI

We tested whether larger auditory responses mark more repeat variation shared between measured sites. Separate public studies supplied human SEEG high-gamma activity and BOLD fMRI. At 24 selected sites, one repeat measured mean response and two other repeats measured disagreement. The score removed within-site quadratic terms and broad sound-group means. Separate sounds set site RMS scales. Development used two patients and four MRI adults. A local code lock preceded six other patients, 16 other B2021 adults and eight NH2015 records. Mean scores were +0.004427 [-0.001895,+0.010749], +0.000061 [-0.000055,+0.000177] and -0.000377 [-0.001904,+0.001150]. Brackets give 95% person Student limits. The declared three-study positive rule failed; its largest required sign-flip reference was 0.71875. Crossed person/sound ranges also included zero. Site-count, baseline and repeat checks were discordant. Planned gain rescaling was unstable. An added pair-gain diagnostic did not change the failed result. Exact models gave positive shared scores from fixed spatial mixing of independent latent errors and from deterministic repeat gains with no random error. The contribution is a checked off-diagonal repeat assay and a negative human benchmark. It does not identify intrinsic neural noise, a common generator or causality. Cohort differences, source selection, shared normalization and measurement filters limit scope. Code, source versions and terms, all results, figures and repeat steps are supplied. Original neural arrays remain external.

auditory cortex · SEEG · fMRI · repeat variation · noise covariance · spatial mixing · reproducible analysis