Middle Eastern Journal of Disability Studies

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Zolfaghari M, Shafiei B, Tahmasebi Garmatani N, Ashoorioon V. Reliability of the Persian Version of the Stuttering Severity Instrument-Fourth Edition (SSI-4) for Preschool-Age Children. MEJDS 2014; 4 (2) :20-25
URL: http://jdisabilstud.org/article-1-361-en.html

Objective: In order to determine the severity of stuttering and to evaluate the results of treatment, we need a standard and reliable instrument. One of the most reliable tools for measuring stuttering is the Stuttering Severity Instrument – Fourth Edition (SSI-4). The purpose of this study was to evaluate intra and inter-rater reliability of the Persian version of the instrument in preschool children with stuttering.

Methods & Materials: A cross-sectional descriptive-analytical study was conducted. To determine inter-rater reliability, 21 preschool children who stuttered were examined by 3 experienced raters. Then, after 7-10 days the test was again performed on 50% of the samples to determine the intra-rater reliability. In order to test reliability, ICC and Cronbach's alpha were used.

Results: The inter-rater reliability of the test in each section of the test was 0.94 to 0.98. The intra-rater reliability (retest) for each section was 0.92 to 0.98. Cronbach’s alpha for the overall test was: (p=0.001, α=87%). 

Conclusion: We observed high reliability in the Persian version of the SSI-4. Hence it may be used for studying stuttering in Persian-speaking preschool children.