Background - The Unified Dyskinesia Rating Scale (UDysRS) was published in 2008. It
was designed to be simultaneous valid, reliable and sensitive to therapeutic changes.
The Movement Disorder Society organizing team developed guidelines for the development
of official non-English translations consisting of four steps: translation/back-translation,
cognitive pretesting, large field testing, and clinimetric analysis. The aim of this
paper was to introduce the new UDysRS and its validation process into Hungarian.
