In the Original Investigation titled “Effects of Improvisational Music Therapy vs Enhanced Standard Care on Symptom Severity Among Children With Autism Spectrum Disorder: the TIME-A Randomized Clinical Trial,” published in the August 8, 2017, issue of JAMA, values were incorrect in Table 1. In the “Value” column under “Enhanced Standard Care,” the No. (%) values for boys should have been reported as 153 (84.1); for native speaker of the country’s main language as 169 (92.9); for previous music therapy as 4 (2.2); and for mental retardation as 84 (44.5). This article was corrected online.