Peak movement velocity did not predict confidence in a 22-patient SEEG cohort

In a behavioral analysis of 5,992 trials from 22 patients in OpenNeuro ds006253 (MetaRDK), peak velocity of the decision movement (vmax) did not predict reported confidence when accuracy, motion coherence, and decision time were held constant (mean coefficient -0.0007 confidence units per SD; 11/22 patient coefficients positive; exact sign-flip p = 0.78). The result remained null after excluding change-of-mind trials (p = 0.78); per-patient Spearman correlations were also null (mean rho = -0.007, p = 0.81). Correct decisions were associated with higher confidence in 20/22 patients (Holm-adjusted p = 1.4e-5), while longer decision times were associated with lower confidence in 20/22 (Holm-adjusted p = 9.5e-6). Coherence had no clear group effect (Holm-adjusted p = 0.11). A corrected analysis excluded 25 trials coded correct=99 as no response; the primary conclusion was unchanged from the planned analysis (vmax p = 0.81 before correction). Patient-specific effects remain possible: vmax coefficients ranged from -0.021 to +0.021. This behavioral analysis did not test SEEG signals and does not establish whether high-gamma activity tracks confidence or movement vigour. Coherence calibration was not checked.

confidence · decision movement · movement velocity · SEEG · sign-flip test · MetaRDK · behavioral analysis