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Related Experiment Videos

The Tourette's Disorder Scale (TODS): development, reliability, and validity.

R Douglas Shytle1, Archie A Silver, Kathy Harnett Sheehan

  • 1Center for Infant and Child Development, Department of Psychiatry and Behavioral Medicine, College of Medicine, University of South Florida, Tampa 33613, USA. dshytle@hsc.usf.edu

Assessment
|September 25, 2003
PubMed
Summary

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Researchers developed the Tourette's Disorder Scale (TODS) to assess illness severity in Tourette's disorder (TD). The TODS effectively measures tics and other common TD symptoms, proving reliable and valid for clinical use.

Area of Science:

  • Neurology
  • Psychiatry
  • Clinical Psychology

Background:

  • Tourette's disorder (TD) presents with a complex range of symptoms beyond tics.
  • A need exists for a standardized, simple instrument to assess overall TD illness severity.

Purpose of the Study:

  • To develop and validate a new scale for assessing Tourette's disorder severity.
  • To create a tool measuring a broad spectrum of TD-related symptoms.

Main Methods:

  • Development and testing of a 15-item Tourette's Disorder Scale (TODS).
  • Assessment of 60 TD patients in a double-blind, placebo-controlled multicenter study.
  • Evaluation of interrater reliability, internal consistency, validity, and sensitivity to change.

Main Results:

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  • The TODS demonstrated good interrater reliability and excellent internal consistency.
  • The scale showed favorable validity and sensitivity to change.
  • Individual TODS items exhibited good convergent and discriminant validity.

Conclusions:

  • The Tourette's Disorder Scale (TODS) is a simple and efficient tool for assessing TD severity.
  • The TODS can be used by clinicians and parents to rate multiple common symptoms in TD patients.