White-matter pathways form the structural backbone for communication across the human connectome, yet whether functional connectivity (FC) involving white matter carries information beyond gray-matter networks remains unclear. Here, we tested whether white-matter FC (W-M FC) uniquely predicted brain age, cognition, and psychopathology. Across four independent developmental cohorts spanning childhood to young adulthood (total n = 2,370), we showed that W-M FC, including both white-white and…
