Research Article

Turkish adaptation and psychometric validation of the Weight Literacy Scale in Turkish adults

Number: 1 September 8, 2026

Turkish adaptation and psychometric validation of the Weight Literacy Scale in Turkish adults

Abstract

Objective: The purpose of study to adapt the Weight Literacy Scale (WLS) into Turkish and to evaluate its psychometric properties in Turkish adults. 
Methods: This cross-sectional methodological study included linguistic validation along with comprehensive validity and reliability analyses. Internal consistency was evaluated using Cronbach’s alpha, McDonald’s omega, and item-total correlations. The test-retest method was applied at a two-week interval to evaluate temporal stability. Test-retest reliability was assessed using the intraclass correlation coefficient (ICC), and construct and structural validity were examined through exploratory factor analyses (EFA) and confirmatory factor analyses (CFA).  
Results: Data were collected from 322 participants aged-19-64 years. According to the results of the Kaiser-Meyer-Olkin (KMO) test, the sample size was adequate (KMO=0.784). The Bartlett’s test of sphericity indicated that there were sufficient correlations among the items to conduct factor analysis (χ² =1997.3, p<0.0001). The internal consistency coefficients and ICC values being at 0.80 indicate that the Turkish version of the scale demonstrates good to excellent reliability. In the present study, the total variance explained by the scale was 36.4% that has been considered sufficient when supported by adequate factor loadings and reliability coefficients. The Cronbach’s alpha coefficient was 0.80 demonstrating that the Turkish version of the WLS has good internal consistency and temporal stability. 

Conclusion: This study showed that the WLS was a reliable and valid tool for assessing the weight literacy levels of Turkish adults. 

Keywords

Validity and Reliability, Body Weight, Literacy, Obesity

Ethical Statement

This study was approved by Başkent University Institutional Review Board and Ethics Committee (project no: KA23/366) and supported by Başkent University Research Fund.

References

  1. World Health Organization. Obesity and overweight [Fact sheet]. Geneva:World Health Organization;May 7, 2025. Available from:https://www.who.int/news-room/fact-sheets/detail/obesity-and-overweight).
  2. NCD Risk Factor Collaboration (NCD-RisC). Homepage. Accessed February 2, 2026. https://ncdrisc.org/ World Obesity Federation. World Obesity Atlas 2025. London, UK:World Obesity Federation;2025. https://data. worldobesity.org/publications/?cat=23
  3. T.C. Sağlık Bakanlığı. Türkiye Beslenme ve Sağlık Araştırması (TBSA) 2017. Ankara:Sağlık Bakanlığı, 2018.
  4. Ministry of Health of Türkiye, World Health Organization. Türkiye Household Health Survey on the Prevalence of Risk Factors for Noncommunicable Diseases (THSA) 2023. World Health Organization;2025.
  5. Finkelstein EA, Trogdon JG, Cohen JW, Dietz W. Annual medical spending attributable to obesity:payer-and service-specific estimates. Health Aff (Millwood). 2009;28(5):w822-31.
  6. Tsai TI, Lee SD. Development and validation of a Weight-Specific Health Literacy Instrument (WSHLI). Obes Res Clin Pract. 2018;12(2):214-21.
  7. Institute of Medicine (US) Committee on Health Literacy;Nielsen-Bohlman L, Panzer AM, Kindig DA, eds. Health Literacy:A Prescription to End the Confusion. Washington (DC):National Academies Press (US);2004.
  8. Wang ML, Little TV, Frisard C, Borg A, Lemon SC, Rosal MC. Development and validation of a Weight Literacy Scale in English and Spanish. PLoS One. 2018;13(10):e0204678.
  9. Institute of Medicine (US) Committee on Health Insurance Status and Its Consequences. America’s Uninsured Crisis:Consequences for Health and Health Care. Washington (DC):National Academies Press (US), 2009.
  10. Silk KJ, Sherry J, Winn B, Keesecker N, Horodynski MA, Sayir A. Increasing nutrition literacy:testing the effectiveness of print, web site, and game modalities. J Nutr Educ Behav. 2008;40(1):3-10.
APA
Olcay Eminsoy, İ., Oral, E. A., Akçil Ok, M., & Kiziltan, G. (2026). Turkish adaptation and psychometric validation of the Weight Literacy Scale in Turkish adults. Turkish Journal of Public Health, 1. https://doi.org/10.20518/tjph.1887028
AMA
1.Olcay Eminsoy İ, Oral EA, Akçil Ok M, Kiziltan G. Turkish adaptation and psychometric validation of the Weight Literacy Scale in Turkish adults. TJPH. 2026;(1). doi:10.20518/tjph.1887028
Chicago
Olcay Eminsoy, İrem, Emel Aydan Oral, Mehtap Akçil Ok, and Gul Kiziltan. 2026. “Turkish Adaptation and Psychometric Validation of the Weight Literacy Scale in Turkish Adults”. Turkish Journal of Public Health, no. 1. https://doi.org/10.20518/tjph.1887028.
EndNote
Olcay Eminsoy İ, Oral EA, Akçil Ok M, Kiziltan G (September 1, 2026) Turkish adaptation and psychometric validation of the Weight Literacy Scale in Turkish adults. Turkish Journal of Public Health 1
IEEE
[1]İ. Olcay Eminsoy, E. A. Oral, M. Akçil Ok, and G. Kiziltan, “Turkish adaptation and psychometric validation of the Weight Literacy Scale in Turkish adults”, TJPH, no. 1, Sept. 2026, doi: 10.20518/tjph.1887028.
ISNAD
Olcay Eminsoy, İrem - Oral, Emel Aydan - Akçil Ok, Mehtap - Kiziltan, Gul. “Turkish Adaptation and Psychometric Validation of the Weight Literacy Scale in Turkish Adults”. Turkish Journal of Public Health. 1 (September 1, 2026). https://doi.org/10.20518/tjph.1887028.
JAMA
1.Olcay Eminsoy İ, Oral EA, Akçil Ok M, Kiziltan G. Turkish adaptation and psychometric validation of the Weight Literacy Scale in Turkish adults. TJPH. 2026. doi:10.20518/tjph.1887028.
MLA
Olcay Eminsoy, İrem, et al. “Turkish Adaptation and Psychometric Validation of the Weight Literacy Scale in Turkish Adults”. Turkish Journal of Public Health, no. 1, Sept. 2026, doi:10.20518/tjph.1887028.
Vancouver
1.İrem Olcay Eminsoy, Emel Aydan Oral, Mehtap Akçil Ok, Gul Kiziltan. Turkish adaptation and psychometric validation of the Weight Literacy Scale in Turkish adults. TJPH. 2026 Sep. 1;(1). doi:10.20518/tjph.1887028