Shahid Beheshti University Journal of Neurodevelopmental Cognition 2645-565X 6 3 2025 10 01 Alpha-band fronto-posterior imaginary coherence during musical joint action: null results from an open EEG dataset 1 10 107293 10.48308/jncog.2026.244436.1038 EN Mohammad Mahdi Rezapour Institute for Cognitive and Brain Sciences ,Shahid Beheshti University, Tehran,Iran. 0009-0003-2633-1369 Journal Article 2025 07 13 <strong>Objective</strong>: Joint agency–the experience of controlling action outcomes together with another person–is a core construct in social cognition. We reanalyzed the open Joint Agency EEG dataset (N = 23 for condition contrast; N = 21 for rating split) to test whether intra-brain alpha-band (8–13 Hz) connectivity supports this experience.<br><strong>Method:</strong> Specifically, we estimated seed-based imaginary coherence from frontal electrode Fz_L to distributed scalp channels. Building on prior work linking auditory ERPs and inter-brain beta synchrony to joint agency, we tested two contrasts: (1) objective task condition (musical duet/joint vs constant-pitch/individual) and (2) subjective experience (within-subject median split of JointAgencyRatings: high vs low). Subject-level maps were compared using cluster-based one-sample permutation tests with channel-adjacency correction.<br><strong>Results:</strong> In both analyses, no clusters survived correction (p < .05). Although descriptive topographies showed spatially structured variation, effects were not statistically reliable at the cluster level.<br><strong>Discussion</strong>: These null results provide informative constraints on alpha-gating accounts of joint agency. Practically, they suggest that future studies should test alternative mechanisms, time windows, and network targets when probing neural signatures of shared agency. https://jncog.sbu.ac.ir/article_107293_a7cc99112956c78cc2f9896f879f8c9c.pdf