Yale Global Tic Severity Scale
PSYCHOLOGICAL MEASUREMENT
The Yale Global Tic Severity Scale (YGTSS) is a psychological measure designed to assess the severity and frequency of symptoms of disorders such as tic disorder, Tourette syndrome, and obsessive-compulsive disorder, in children and adolescents between ages 6 and 17.Sukhodolsky DG, Gladstone TR, Kaushal SA, Piasecka JB, Leckman JF (2017).