Strong beta phase-slope links had 2.1 percentage points more mean sign agreement in the next minute than all eligible links in 19 SEEG records

We tested whether strong beta phase-slope links kept their sign in the next minute. We used 19 interictal SEEG records from OpenNeuro ds003876 version 1.0.2. Adjacent contact subtraction gave 82,162 eligible links between shaft prefixes. A fixed rule selected ten percent within each shaft pair, rounded up. Mean sign agreement was 53.30 percent for selected links and 51.21 percent for all eligible links. The mean gain was 2.09 percentage points. Its patient bootstrap 95 percent interval was 0.74 to 3.61 points. The planned exact patient sign-flip test gave p = 0.006435. This test assumes independent patients and symmetric contrasts under a zero null. The 30-second check gave a gain of 0.08 points. The result measures short-window sign repeatability. It does not establish true neural direction. The patients were reused from prior work. All 19 public source records were rebuilt. All Fourier inputs matched exactly. Both complete reruns reproduced all 25 main output files. The package preserves the local plan, code, Fourier inputs, link values, results, source receipts, and reproduction instructions.

phase-slope index · sign repeatability · stereoelectroencephalography · SEEG · intracranial EEG · electrophysiology · signal processing · epilepsy