This study was planned to examine the validity and reliability of the Turkish version of the Situational Vertigo Questionnaire (SVQ), which is used to evaluate dizziness symptoms frequently seen in vestibular pathologies and triggered by visual or environmental stimuli. The research is designed as a methodological scale adaptation and psychometric evaluation study. The study plans to include individuals aged 18 and over who can read and understand Turkish and have complaints of situational dizziness. The Turkish adaptation process of the SVQ will be carried out using the back-and-forth translation method; a pilot application will be conducted after ensuring linguistic and cultural equivalence. For the psychometric evaluation, the sample size is planned to be at least 10 times the number of items, and participants will be asked to complete the SVQ, as well as the Dizziness Handicap Inventory (DHI), Vertigo Symptom Scale (VSS), and Visual Analog Scale (VAS). To evaluate test-retest reliability, a subgroup of participants will be re-administered the SVQ after 7 days. No invasive procedures will be performed on participants during the research; only survey forms will be used. Written informed consent will be obtained from all participants, and data will be coded and analyzed in accordance with confidentiality principles. It is expected that the findings of this study will contribute to the literature by establishing a valid and reliable measurement tool in Turkish for the evaluation of situational dizziness symptoms and will support clinical evaluation processes.
Study Type
OBSERVATIONAL
Enrollment
3
The Turkish adaptation of the Situational Vertigo Questionnaire (SVQ) will follow internationally accepted cross-cultural adaptation guidelines using a forward-backward translation method. Two independent bilingual translators will translate the original English version into Turkish, producing two versions that will be compared and synthesized into a preliminary Turkish form. This version will then be back-translated into English by two native English speakers blinded to the original scale. A committee of translators and experts will review all versions to ensure conceptual and linguistic equivalence and create a pre-final Turkish version. The pre-final version will be pilot tested with 20 participants to assess clarity and comprehension. Items reported as unclear will be revised. Finally, the scale will be administered to a larger sample for psychometric evaluation of validity and reliability.
Güneşli Erdem Hastanesi
Bağcılar, Güneşli, Turkey (Türkiye)
RECRUITINGSituational Vertigo Questionnaire (SVQ)
The Situational Vertigo Questionnaire (SVQ) is a 19-item self-report scale designed to assess visual vertigo associated with increased visual dependence and insufficient vestibular compensation. Visual vertigo refers to dizziness triggered or worsened in visually complex or disorienting environments such as supermarkets, driving, or moving visual scenes. The condition is thought to arise from difficulties resolving conflicts between visual, vestibular, and proprioceptive inputs. The SVQ asks individuals to rate the severity of dizziness in situations involving visual motion or visual-vestibular conflict. Each item is scored from 0 (none) to 4 (severe), and participants may select "never experienced" if applicable. The total score is calculated based on the average item score, adjusted for items marked as not experienced, with higher scores indicating more severe symptoms.
Time frame: Baseline and 7-14 days follow-up
Dizziness Handicap Inventory (DHI)
The scale is used to evaluate the physical, emotional, and functional effects of vestibular disorders. Items 1, 4, 8, 11, 13, 17, and 25 assess physical disability; items 2, 9, 10, 15, 18, 20, 21, 22, and 23 assess emotional disability; and items 3, 5, 6, 7, 12, 14, 16, 19, and 24 assess functional disability. Each item is scored as "yes" (4 points), "no" (0 points), or "sometimes" (2 points). Cut-off values of 28 points for physical disability and 36 points for functional and emotional disability are used. Higher scores indicate more severe dizziness-related impairment.
Time frame: Baseline and 7-14 days follow-up
Vertigo Symptom Scale (VSS)
This questionnaire is designed to assess symptoms accompanying dizziness or perceived imbalance, their frequency, the individual's general mood and anxiety level, and the impact of these symptoms on quality of life. Participants rate each symptom according to how often it occurs using a scale from 0 to 4 (0 = never, 1 = very rarely, 2 = sometimes, 3 = often \[about once a week\], 4 = very often \[most days\]). The Turkish validity and reliability of the scale was established by Yanık and colleagues.
Time frame: Baseline and 7-14 days follow-up
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