A fixed test did not confirm person matching between theta EEG and fMRI in 48 adults at two centers

We tested whether a person's theta EEG connection pattern agrees more with that person's fMRI pattern than with other people's patterns. Public simultaneous EEG-fMRI data came from two centers. Exploration used 21 healthy adults and selected theta EEG, 4 to 8 Hz. A local plan then fixed the test in 48 other adults. It removed each diagnosis cell's mean map and additive region strength. Person comparisons stayed within center and diagnosis. In 23 test patients at the 256-channel center, mean matching advantage was -0.004989, with an approximate 95% person jackknife interval of -0.019458 to +0.009480. In 25 test people at the 64-channel center, it was +0.004666, with interval -0.015562 to +0.024895. Whole-person label tests gave p = 0.73953 and p = 0.28864. The fixed positive rule at both centers failed. No EEG band passed the five-band shared correction. Theta top-one retrieval was weak in both query directions. Fixed checks addressed motion, age, sex, distance, region strength and data retention. Their theta intervals included zero at both centers. Descriptive group maps still agreed. Such group agreement is unchanged by person mismatch and cannot establish shared individuality. The package gives a reusable benchmark, an exact assignment reference, all outcomes, source data and terms, code, plans, figures and independent arithmetic checks. Different acquisition systems, one session per person, small diagnosis cells and residual physiological or anatomical effects limit the test. The results do not show that cross-modal person information is absent or establish a neural cause.

EEG · fMRI · functional connectivity · person matching · differential identifiability · negative result · reproducibility · temporal lobe epilepsy