Journal of the Korean Society of Laryngology, Phoniatrics and Logopedics (대한후두음성언어의학회지)

The Korean Society of Laryngology, Phoniatrics and Logopedics. (대한후두음성언어의학회)
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Validation of the Korean Voice Perceived Present Control Scale: A Pilot Study

한국판 목소리 자기조절 척도의 신뢰도 및 타당도 예비연구

  • Lee, Jeong Min (Department of Otorhinolaryngology-Head & Neck Surgery, Ewha Womans University School of Medicine) ;
  • Jung, Soo Yeon (Department of Otorhinolaryngology-Head & Neck Surgery, Ewha Womans University School of Medicine) ;
  • Kim, Bin-Na (Department of Psychology, College of Social Sciences, Gachon University) ;
  • Kim, Han Su (Department of Otorhinolaryngology-Head & Neck Surgery, Ewha Womans University School of Medicine)
  • 이정민 (이화여자대학교 의과대학 이비인후과학교실) ;
  • 정수연 (이화여자대학교 의과대학 이비인후과학교실) ;
  • 김빛나 (가천대학교 사회과학대학 심리학과) ;
  • 김한수 (이화여자대학교 의과대학 이비인후과학교실)
  • Received : 2022.04.01
  • Accepted : 2022.04.28
  • Published : 2022.08.31
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Abstract

Background and Objectives The Voice Perceived Present Control scale (VPPC) has been developed to provide better insight into patients' perceived control over their thoughts or behaviors related to voice disorders. The objective of the present study was to validate the Korean VPPC (K-VPPC) by evaluating its internal consistency and reliability. Materials and Method All items of the English VPPC were translated into Korean. Content validity was analyzed through three Delphi survey rounds by an expert panel (n=44) with active clinical and research experience in treating dysphonic patients. Twenty-three patients with a heterogeneous diagnosis of dysphonia and twenty-three gender-matched vocally normal controls (total n=46) were asked to complete the K-VPPC and the Korean Voice Handicap Index-10 (KVHI-10). Psychometric properties including internal consistency and reliability were evaluated to examine the appropriateness of cross-cultural use of K-VPPC. Results Cronbach's alpha coefficient of K-VPPC was 0.89 for dysphonic patients, indicating good internal consistency in clinical samples. Furthermore, patients with dysphonia scored significantly lower on the total score of K-VPPC and higher on voice handicap than the vocally normal controls. Spearman's correlation coefficients indicated an inverse and moderate association between the K-VPPC and all domains of KVHI-10 (Spearman's r=-0.44- -0.68). Conclusion The findings of the current study indicated that the K-VPPC is a valid and reliable tool for the assessment of perceived control in Korean patients with dysphonia. Therefore, the K-VPPC could be a useful and complementary tool for the comprehensive evaluation of dysphonia, thereby improving care in Korean patients with voice disorders.

Keywords

Acknowledgement

This research was supported by Post-Doctoral Fellowship Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2021R1A6A01087023).

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