A fixed test did not confirm a shared sound class effect in 14 iEEG patients and 16 fMRI adults

We tested whether a nearer acoustic neighbor from another sound class has a larger cortical response difference than a same-class neighbor. The fixed rule also required a larger mean effect in selected association than early auditory parcels. Separate public studies supplied signed LFP responses and BOLD fMRI. Four MRI adults supplied development. The fixed tests used 14 patients after baseline subtraction and 16 other MRI adults. Both shared rules failed after Holm correction, p=1. With five classes, mean association scores were 0.07944 in iEEG and 0.24854 in fMRI. Their 95% person Student limits were [-0.02537,0.18426] and [0.22310,0.27397]. The electrical regional difference was uncertain. A check in eight adults from another MRI study left the regional difference uncertain when the source voice class was omitted. All negative people and failed checks remain. An added model audit gives the exact score range over noiseless linear acoustic tuning. Every library and panel had a positive acoustic-only upper bound. Some measured scores exceeded the ten-axis range. All 152 regional scalars were inside the full-descriptor ranges with unrestricted weights and could be matched one scalar at a time. Those post-analysis matches do not fit full neural responses or predict new sounds. The contribution is a fixed negative benchmark and a checked acoustic range tool. No positive cross-modal neural effect or causal claim was confirmed. Separate cohorts, clinical sampling, source screens, unequal errors and measurement filters limit scope. Code, licensed compact inputs, source pins and terms, all results, figures and repeat steps are supplied.

auditory cortex · human iEEG · fMRI · sound classes · acoustic tuning · negative result · model bounds