Duration and gap response orders did not pass a shared positive test in eight ECoG patients and six fMRI adults

We tested whether visual areas with a larger relative response to long images also retain more response when two brief images have a short gap. Separate public human studies supplied surface ECoG from eight patients and BOLD fMRI from six other adults. Four distinct condition means defined two gain-invariant contrasts. We computed their spatial Kendall rank agreement within each person. The fixed shared positive rule failed. Mean tau was -0.0583 in ECoG, with a 95% person t interval of -0.7086 to +0.5919. The fMRI mean ranged from -0.2222 to -0.0111 over all 72 possible links between repeated records. Its t interval union was -0.7045 to +0.4374. The shared one-sided sign-flip probability was 0.921875. Controls changed signs and retained broad uncertainty. Electrical gap-response orders repeated poorly between trial halves. A later check of positive source estimates and matched area coverage did not replace the failed test. The result does not confirm the proposed spatial surrogate across modalities. It also does not establish independent biological processes or causality. The package supplies permitted compact inputs, source versions and terms, fixed and later plans, all results, code, figures and repeat instructions.

visual cortex · ECoG · fMRI · adaptation · temporal summation · rank agreement · negative result · reproducibility