Author(s): Ronald B. Gilliam, PhD, CCC-SLP / Kenneth J. Logan, PhD, CCC-SLP / Nils A. Pearson, PhD
The TOCS was normed on a sample of 173 typically developing children and 123 students identified as stutterers. Statistical analysis produced coefficient alphas for internal consistency ranging from .76 to .98 on the Speech Fluency Measure subtests, and .83 to .93 on the two rating scales. Test-retest coefficients exceeded .90 for the Speech Fluency Measure and .85 for the two rating scales. Interrater reliability exceeded .90 on all components of the assessment.
Administration and Scoring
Administration time is 20-30 minutes. Raw scores for the four subtests on the Standardized Speech Fluency Measure are used to identify the severity level (Typical Fluency, Mild Disfluency, Moderate Disfluency, or Severe Disfluency) and are converted to an index score and percentile rank.
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