Yale Global Tic Severity Scale (Y-GTSS)

The Y-GTSS is a semi-structured clinician rated instrument that assesses the nature of motor and phonic tics, and is administered as part of the KSADS interview, if indicated.

Domains Assessed: Psychotic and Atypical Behavior, Tics

Note: The Y-GTSS is administered to Participants ages 6+.

References: Leckman J.F., Riddle M.A., Hardin M.T., Ort S.L., Swartz K.L., Stevenson J., et al. (1989). The Yale Global Tic Severity Scale: Initial testing of a clinician-rated scale of tic severity. Journal of the American Academy of Child and Adolescent Psychiatry. 28, 566–573.

Time to Complete: 10 minutes

A complete list of assessments can be found here.