Objective The Yale Global Tic Severity Scale (YGTSS) is the most commonly used clinician-rated evaluation tool for Tourette syndrome (TS). with established reliability and validity. This study aims to determine whether the YGTSS is a valid parent-reported assessment in the TS population. Design A prospective cohort study. https://www.roneverhart.com/Echo-Fix-EF-P2-Spring-Reverb-Pedal-p32083/