Music training has been found to produce a range of cognitive benefits for young children, although well-controlled evaluation of the effects on psychosocial functioning has been limited. In this study participants were recruited from two grade levels (prep/grade 1, N = 210; grade 3, N = 149), and were allocated to a music education condition, or a control condition which continued to receive their usual curriculum. In the treatment condition, Kodaly music classes were introduced into the younger cohort's curriculum, while the older cohort received additional instrumental