مقایسهٔ روش‌ها

	ابزار سنجش شدت لکنت – ویرایش چهارم	شاخص معلولیت صدا (Voice Handicap Index)
حوزه	آسیب‌شناسی گفتار و زبان	آسیب‌شناسی گفتار و زبان
خانواده	Process / pipeline	Process / pipeline
سال پیدایش	2009	1997
پدیدآور	Riley, G. D.	Jacobson, B. H., et al.
نوع	Clinician-rated	Self-report
منبع بنیادین	Riley, G. D. (2009). Stuttering Severity Instrument for Children and Adults–Fourth Edition (SSI-4). Austin, TX: Pro-Ed Publications. ISBN: 978-1-59820-072-7	Jacobson, B. H., Johnson, A., Grywalski, C., Silbergleit, A., Jacobson, G., Benninger, M. S., & Newman, C. W. (1997). The Voice Handicap Index (VHI): Development and Validation. American Journal of Speech-Language Pathology, 6(3), 66–70.
نام‌های دیگر	SSI-4, SSI, Stuttering Severity Index	VHI, VHI-30
مرتبط	3	2
خلاصه	The Stuttering Severity Instrument–Fourth Edition (SSI-4) is the standard clinician-administered measure of stuttering severity in children (ages 2–13) and adults (ages 14–75). Developed by Riley (2009), SSI-4 quantifies stuttering through three behavioral components: frequency (percentage of syllables stuttered), duration (average length of stuttering moments), and physical concomitants (observable tension and associated movements). SSI-4 Severity Scores enable reliable tracking of treatment response, prognosis estimation, and comparison across populations, making it essential for evidence-based stuttering assessment and research.	The Voice Handicap Index (VHI) is a 30-item self-report questionnaire that measures the impact of voice disorders on quality of life and functional communication. Developed by Jacobson and colleagues in 1997, it quantifies the psychosocial, physical, and emotional burden of dysphonia across functional, physical, and emotional domains. Widely used in otolaryngology and speech-language pathology to assess treatment outcomes and monitor disease progression.