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Locus of Control and Dizziness: Mediation Effect of Self-Efficacy
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Yemo Jeong, Won Hwa Jin, Eun-Jin Kwon, In-Sun Kwon, Han Young Yu, Seong-Hae Jeong
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Res Vestib Sci. 2021;20(4):126-133. Published online December 15, 2021
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DOI: https://doi.org/10.21790/rvs.2021.20.4.126
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 Abstract
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- Objectives
An attention to psychological aspects can clarify the understanding and management of patients with unresolved dizziness/vertigo. Thus, we study the locus of control and the mediation effect of self-efficacy for assessing the relationship between locus of control and dizziness/vertigo in a referral-based dizziness clinic.
Methods
We analyzed the dizziness-specific locus of control and self-efficacy using the modified questionnaire in 117 consecutive dizzy patients (34 males; age range, 20–74 years). In addition to the visual analogue scale-dizziness for evaluation of subjective dizziness, the following items were further evaluated; Korean Dizziness Handicap Inventory, Korean Beck Depression Inventory II, and Korean Beck Anxiety Inventory. According to the verification procedure proposed by Hayes, the mediation effect of self-efficacy verifies the relationship between the locus of control and dizziness through analysis.
Results
Except the scale of emotion such as anxiety and depression, sex, age, duration of illness, and diagnosis all did not significantly affect the dependent variables. Vestibular migraine (39.3%), vestibulopathy (15.4%), and dizziness associated with anxiety and depression (14.5%) were the most common diagnoses. On all scales, Cronbach’s α ranged from 0.72 to 0.94. In the direct effect, the internal locus of control had a tendency of aggravation of dizziness/vertigo, but in the indirect effect, the higher the internal locus of control, the higher the self-efficacy, and the higher the self-efficacy, the lower the dizziness.
Conclusions
In our study, we can assume that the locus of control can impart ambivalent effects on dizziness/vertigo. And the modulation of self-efficacy could be another treatment for patients with unresolved dizziness.
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The Feasibility and Utility of a Mobile-Based Eye Movement Recording Application: A Randomized Trial
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Hee Jin Chang, Sooyoung Kim, In-Sun Kwon, Han Young Yu, Seong-Hae Jeong
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Res Vestib Sci. 2020;19(4):120-126. Published online December 15, 2020
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DOI: https://doi.org/10.21790/rvs.2020.19.4.120
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Abstract
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 Supplementary Material
- Objectives
This study was performed to assess the efficacy and feasibility of mobile application-based Frenzel tests in dizziness clinics.
Methods
We performed an investigator-initiated, blinded-outcome assessor, parallel, randomized controlled crossover trial at Chungnam National University Hospital between August 2019 and October 2019. Certified medical staffs were randomly assigned to the intervention group (i.e., a mobile application-based Frenzel glass system, n=15) or the observation group (i.e., a conventional desktop-based Frenzel glass system, n=15); the groups applied the respective systems for the preparation of eye movement recording and switched systems. The primary outcome was the elapsed time in seconds it took the participants to prepare the system for eye recording simulation. The secondary outcomes were perceived stress and satisfaction scores after completion of the operation, as measured by a questionnaire using 10-point Likert scales.
Results
The mean time of machine preparation for eye recording simulation was reduced by 50% in the mobile application group compared to the desktop group in both study periods (38.0±7.1 sec vs. 76.0±8.7 sec). We detected no carryover effect. Participants also reported lower stress while using application than while using the desktop system (2.3±1.3 vs. 4.6±2.4; p＜0.001). The application obtained a mean overall satisfaction score of 9.2 out of 10.
Conclusions
The implementation of an eye movement recording application in a dizziness examination was well adopted by users and decreased the time and stress related to machine operation.
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KBS
