(SSI-4) Stuttering Severity Instrument
Glyndon Riley
SSI-4: Stuttering Severity Instrument – Fourth Edition is a reliable and valid norm-referenced stuttering assessment that can be used for both clinical and search purposes. It has four components, each of which is used to assess and monitor the stuttering severity in both children and adults for clinical and research use: (1) Examiner’s Manual and Picture Plates, (2) Test Record
and Frequency Computation Forms, (3) Subjective Stuttering Scales, and (4) Computerized Scoring of Stuttering Severity (Software Version 2.0). The SSI-4 can also be used in conjunction with the Stuttering Prediction Instruments for Young Children (SPI).
Areas of Speech Therapy Measured:
• Frequency: Expressed as percentage of syllables stuttered and converted to scale scores ranging from 2 to 18
• Duration: Average length of the three longest stuttering events, timed to the nearest tenth of a second and converted to scale scores ranging from 2 to 18
• Physical Concomitants: Distracting sounds, facial grimaces, head movements, and arm and leg movements, expressed as scale scores ranging from 0 to 20
• Naturalness of the Individual’s Speech
SSI-4 Computerized Scoring of the Stuttering Severity (Version 2; CSSS-2.0):
The Computerized Scoring Software is provided to facilitate the calculation of frequency and duration. The CSSS-2.0 automatically produces a record of the percentage of syllables stuttered (frequency) and the duration of the three longest stuttering events.
Ages: 2.10 years and up
Administration: Individual; 15-20 minutes
Fourth Edition
The SSI-4 Complete Kit includes:
• Examiner’s Manual
• Picture Plates
• Test Record and Frequency
Computation Forms (25)
