Stuttering Severity Instrument – 4th Edition (SSI-4)

Stuttering Severity Instrument?Fourth Edition (SSI-4) is a reliable and valid norm-referenced stuttering assessment that can be used for both clinical and search purposes. It measures stuttering severity in both children and adults in the four areas of speech behavior:
? Frequency
? Duration
? Physical concomitants
? Naturalness of the individual?s speech.