Under independent symmetric null signs, the phase test did not detect a change in bilateral theta power correlation in two sessions from each of 12 SEEG patients with hippocampal anchor pairs

We tested bilateral theta power correlation in two memory phases. We used the first two eligible sessions from each of 12 patients in public SEEG dataset ds004752 version 1.0.1. The sample had 24 sessions and 1,000 trials. Each signal used a hippocampal anchor minus its next contact. The patient mean Fisher difference, maintenance minus encoding, was 0.0558. The 95 percent patient bootstrap interval was [-0.0226, 0.1381]. The exact two-sided sign probability was 0.224609. The main test did not detect a phase difference at the fixed 0.05 threshold. This result does not establish equal phase correlations. The exact test requires independent patient effects with symmetric null signs. Power correlation does not measure phase synchrony or causal communication. The package includes code, features, raw signal fixtures, source hashes, fitted models, and all nine planned secondary checks.

theta power · bilateral correlation · SEEG · hippocampus · verbal working memory · epilepsy · exact sign test