Development of the 25-item Cardiff Visual Ability Questionnaire for Children (CVAQC)

Jyoti Khadka, Barbara Ryan, Tom H Margrain, Helen Court, J Margaret Woodhouse

Research output: Contribution to journalArticle

68 Citations (Scopus)

Abstract

AIMS: To develop and validate a short questionnaire to assess self-reported visual ability in children and young people with a visual impairment.

METHODS: A list of 121 items was generated from 13 focus groups with children and young people with and without a visual impairment. A long 89-item questionnaire was piloted with 45 visually impaired children and young people using face-to-face interviews. Rasch analysis was used to analyse the response category function and to facilitate item removal ensuring a valid unidimensional scale. The validity and reliability of the short questionnaire were assessed on a group of 109 visually impaired children (58.7% boys; median age 13 years) using Rasch analysis and intraclass correlation coefficient (ICC).

RESULTS: The final 25-item questionnaire has good validity and reliability as demonstrated by a person separation index of 2.28 and reliability coefficient of 0.84. The items are well targeted to the subjects with a mean difference of -0.40 logit between item and person means, and an ICC of 0.89 demonstrates good temporal stability.

CONCLUSION: The Cardiff Visual Ability Questionnaire for Children (CVAQC) is a short, psychometrically robust and a self-reported instrument that works to form a unidimensional scale for the assessment of the visual ability in children and young people with a visual impairment.

LanguageEnglish
Pages730-5
Number of pages6
JournalThe British journal of ophthalmology
Volume94
Issue number6
DOIs
Publication statusPublished - Jun 2010
Externally publishedYes

Keywords

  • Activities of Daily Living
  • Adolescent
  • Attitude to Health
  • Child
  • Child, Preschool
  • Disability Evaluation
  • Epidemiologic Methods
  • Female
  • Humans
  • Male
  • Psychometrics
  • Surveys and Questionnaires
  • Vision, Low
  • Visual Acuity
  • Visually Impaired Persons
  • Journal Article
  • Research Support, Non-U.S. Gov't
  • Validation Studies

Cite this

Khadka, Jyoti ; Ryan, Barbara ; Margrain, Tom H ; Court, Helen ; Woodhouse, J Margaret. / Development of the 25-item Cardiff Visual Ability Questionnaire for Children (CVAQC). In: The British journal of ophthalmology. 2010 ; Vol. 94, No. 6. pp. 730-5.
@article{107c1510fe3f42a8bf9a6aa1acaedbb5,
title = "Development of the 25-item Cardiff Visual Ability Questionnaire for Children (CVAQC)",
abstract = "AIMS: To develop and validate a short questionnaire to assess self-reported visual ability in children and young people with a visual impairment.METHODS: A list of 121 items was generated from 13 focus groups with children and young people with and without a visual impairment. A long 89-item questionnaire was piloted with 45 visually impaired children and young people using face-to-face interviews. Rasch analysis was used to analyse the response category function and to facilitate item removal ensuring a valid unidimensional scale. The validity and reliability of the short questionnaire were assessed on a group of 109 visually impaired children (58.7{\%} boys; median age 13 years) using Rasch analysis and intraclass correlation coefficient (ICC).RESULTS: The final 25-item questionnaire has good validity and reliability as demonstrated by a person separation index of 2.28 and reliability coefficient of 0.84. The items are well targeted to the subjects with a mean difference of -0.40 logit between item and person means, and an ICC of 0.89 demonstrates good temporal stability.CONCLUSION: The Cardiff Visual Ability Questionnaire for Children (CVAQC) is a short, psychometrically robust and a self-reported instrument that works to form a unidimensional scale for the assessment of the visual ability in children and young people with a visual impairment.",
keywords = "Activities of Daily Living, Adolescent, Attitude to Health, Child, Child, Preschool, Disability Evaluation, Epidemiologic Methods, Female, Humans, Male, Psychometrics, Surveys and Questionnaires, Vision, Low, Visual Acuity, Visually Impaired Persons, Journal Article, Research Support, Non-U.S. Gov't, Validation Studies",
author = "Jyoti Khadka and Barbara Ryan and Margrain, {Tom H} and Helen Court and Woodhouse, {J Margaret}",
year = "2010",
month = "6",
doi = "10.1136/bjo.2009.171181",
language = "English",
volume = "94",
pages = "730--5",
journal = "The British journal of ophthalmology",
issn = "0007-1161",
number = "6",

}

Development of the 25-item Cardiff Visual Ability Questionnaire for Children (CVAQC). / Khadka, Jyoti; Ryan, Barbara; Margrain, Tom H; Court, Helen; Woodhouse, J Margaret.

In: The British journal of ophthalmology, Vol. 94, No. 6, 06.2010, p. 730-5.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Development of the 25-item Cardiff Visual Ability Questionnaire for Children (CVAQC)

AU - Khadka, Jyoti

AU - Ryan, Barbara

AU - Margrain, Tom H

AU - Court, Helen

AU - Woodhouse, J Margaret

PY - 2010/6

Y1 - 2010/6

N2 - AIMS: To develop and validate a short questionnaire to assess self-reported visual ability in children and young people with a visual impairment.METHODS: A list of 121 items was generated from 13 focus groups with children and young people with and without a visual impairment. A long 89-item questionnaire was piloted with 45 visually impaired children and young people using face-to-face interviews. Rasch analysis was used to analyse the response category function and to facilitate item removal ensuring a valid unidimensional scale. The validity and reliability of the short questionnaire were assessed on a group of 109 visually impaired children (58.7% boys; median age 13 years) using Rasch analysis and intraclass correlation coefficient (ICC).RESULTS: The final 25-item questionnaire has good validity and reliability as demonstrated by a person separation index of 2.28 and reliability coefficient of 0.84. The items are well targeted to the subjects with a mean difference of -0.40 logit between item and person means, and an ICC of 0.89 demonstrates good temporal stability.CONCLUSION: The Cardiff Visual Ability Questionnaire for Children (CVAQC) is a short, psychometrically robust and a self-reported instrument that works to form a unidimensional scale for the assessment of the visual ability in children and young people with a visual impairment.

AB - AIMS: To develop and validate a short questionnaire to assess self-reported visual ability in children and young people with a visual impairment.METHODS: A list of 121 items was generated from 13 focus groups with children and young people with and without a visual impairment. A long 89-item questionnaire was piloted with 45 visually impaired children and young people using face-to-face interviews. Rasch analysis was used to analyse the response category function and to facilitate item removal ensuring a valid unidimensional scale. The validity and reliability of the short questionnaire were assessed on a group of 109 visually impaired children (58.7% boys; median age 13 years) using Rasch analysis and intraclass correlation coefficient (ICC).RESULTS: The final 25-item questionnaire has good validity and reliability as demonstrated by a person separation index of 2.28 and reliability coefficient of 0.84. The items are well targeted to the subjects with a mean difference of -0.40 logit between item and person means, and an ICC of 0.89 demonstrates good temporal stability.CONCLUSION: The Cardiff Visual Ability Questionnaire for Children (CVAQC) is a short, psychometrically robust and a self-reported instrument that works to form a unidimensional scale for the assessment of the visual ability in children and young people with a visual impairment.

KW - Activities of Daily Living

KW - Adolescent

KW - Attitude to Health

KW - Child

KW - Child, Preschool

KW - Disability Evaluation

KW - Epidemiologic Methods

KW - Female

KW - Humans

KW - Male

KW - Psychometrics

KW - Surveys and Questionnaires

KW - Vision, Low

KW - Visual Acuity

KW - Visually Impaired Persons

KW - Journal Article

KW - Research Support, Non-U.S. Gov't

KW - Validation Studies

U2 - 10.1136/bjo.2009.171181

DO - 10.1136/bjo.2009.171181

M3 - Article

VL - 94

SP - 730

EP - 735

JO - The British journal of ophthalmology

T2 - The British journal of ophthalmology

JF - The British journal of ophthalmology

SN - 0007-1161

IS - 6

ER -