Validation and reliability of the Cardiff Visual Ability Questionnaire for Children using Rasch analysis in a Turkish population

Abstract

Ankara University Ethics Committees registry number 06-177-12.

Validation of an instrument to assess visual ability in children with visual impairment in China

“…This suggests that CYP in China are able to understand and endorse the four-response category similar to CYP with visual impairment in the UK and Turkey 11 15. Moreover, the FVQ-CYP employs the same four-point response category, and was found to be perfectly functional with well-ordered thresholds and adequate separation between adjacent thresholds 11 15.…”

“…This suggests that CYP in China are able to understand and endorse the four-response category similar to CYP with visual impairment in the UK and Turkey 11 15. Moreover, the FVQ-CYP employs the same four-point response category, and was found to be perfectly functional with well-ordered thresholds and adequate separation between adjacent thresholds 11 15. Both the LVP-Visual Function Questionnaire and the IVI-C use five response categories, but are disordered and later repaired into three response categories by collapsing non-functional categories 2 12.…”

“…We chose the CVAQC for this study because it has a content that primarily focuses on school activities, and possesses excellent psychometric properties 7. Moreover, a recent study demonstrated that a meticulously translated CVAQC in the Turkish language formed a valid and reliable measure with robust psychometric properties 15. Therefore, the CVAQC is probably a better instrument for our targeted demographics with a higher discriminating ability; hence, it might produce less noisy measurements of visual ability 15.…”

“…Moreover, a recent study demonstrated that a meticulously translated CVAQC in the Turkish language formed a valid and reliable measure with robust psychometric properties 15. Therefore, the CVAQC is probably a better instrument for our targeted demographics with a higher discriminating ability; hence, it might produce less noisy measurements of visual ability 15. Regarding the other existing instruments, the Children Visual Function Questionnaire was developed for children younger than 7 years old as a parent-proxy survey.…”

Cross-cultural validation of the Functional Vision Questionnaire for Children and Young People (FVQ_CYP) with visual impairment in the Dutch population: challenges and opportunities

“…Both of the two versions of the LV Prasad-Functional Vision Questionnaire have been developed for children in the developing world [13, 14], and therefore some items have limited applicability in developed countries. The Cardiff Visual Ability Questionnaire for Children and Young People has been developed and tested in a specific geographical area in the United Kingdom (UK), and although translated and validated in Turkish and Chinese [15, 16], its applicability elsewhere is currently limited [17].…”