This work was supported by a grant from Shalem Fund.  The main goal of the current study was to examine the developmental trajectories of musical aptitude (tonal and rhythmic) among individuals with non-specific intellectual disability (ID), compared to individuals with typical development (TD) in two age cohorts: older adolescence (17-21) and young adulthood (25-40). Musical aptitude was examined in light of three possible developmental trajectories of intelligence and cognitive ability ...