The reused baseline had a more negative correlation with one-month posterior 8–13 Hz EEG response change in 60 adults

We tested posterior alpha response in 60 adults from OpenNeuro ds004148 version 1.0.1. The response was the closed-eye to open-eye 8–13 Hz power ratio in decibels. The first recording was correlated with change between the second and third recordings: r = -0.167, 95% interval [-0.415, 0.111]. The second recording was about 90 minutes after the first. The third was about one month later. Reusing the second recording as baseline gave r = -0.419. The paired correlation difference was -0.253 [-0.432, -0.096]. All planned checks had a negative difference estimate. A shorter record had a clearer earlier-record association. The results show sensitivity to baseline choice. They do not identify biological recovery or measurement error. The package preserves spectra, source hashes, retrieval code, person scores, uncertainty draws, and validation.

electroencephalography · alpha response · baseline choice · measurement error · test-retest · correlation · bootstrap · permutation test · OpenNeuro · measurement reliability