Late hippocampal theta testing did not detect accuracy differences in 14 SEEG patients under patient independence and null sign symmetry

We tested hippocampal theta power before correct and incorrect verbal memory responses. The primary sample had 1,700 trials from 14 patients with epilepsy. Each trial followed a correct response. The model controlled session, memory load, trial position, probe type, and fixation power. The equal patient mean was +0.211 dB for correct minus incorrect responses. The 95 percent patient bootstrap interval was -0.132 to +0.547 dB. The exact two-sided sign-flip p value was 0.2595. This test assumes independent patient effects and null sign symmetry. The test did not detect a difference at alpha 0.05. The result does not prove equal power. Five planned secondary tests did not pass Holm correction. The package contains source features, metadata, trial tables, code, results, and raw retrieval instructions. A new raw session check matched all 16 feature arrays. Independent numerical checks passed.

hippocampus · theta power · verbal working memory · SEEG · response accuracy · epilepsy