Development, validation and item reduction of a food literacy questionnaire (IFLQ-19) with Australian adults.
Int J Behav Nutr Phys Act
; 19(1): 113, 2022 09 01.
Article
en En
| MEDLINE
| ID: mdl-36050778
ABSTRACT
BACKGROUND:
Food literacy is theorised to improve diet quality, nutrition behaviours, social connectedness and food security. The definition and conceptualisation by Vidgen & Gallegos, consisting of 11 theoretical components within the four domains of planning and managing, selecting, preparing and eating, is currently the most highly cited framework. However, a valid and reliable questionnaire is needed to comprehensively measure this conceptualisation. Therefore, this study draws on existing item pools to develop a comprehensive food literacy questionnaire using item response theory.METHODS:
Five hundred Australian adults were recruited in Study 1 to refine a food literacy item pool using principal component analysis (PCA) and item response theory (IRT) which involved detailed item analysis on targeting, responsiveness, validity and reliability. Another 500 participants were recruited in Study 2 to replicate item analysis on validity and reliability on the refined item pool, and 250 of these participants re-completed the food literacy questionnaire to determine its test-retest reliability.RESULTS:
The PCA saw the 171-item pool reduced to 100-items across 19 statistical components of food literacy. After the thresholds of 26 items were combined, responses to the food literacy questionnaire had ordered thresholds (targeting), acceptable item locations (< -0.01 to + 1.53) and appropriateness of the measurement model (n = 92% expected responses) (responsiveness), met outfit mean-squares MSQ (0.48-1.42) (validity) and had high person, item separation (> 0.99) and test-retest (ICC 2,1 0.55-0.88) scores (reliability).CONCLUSIONS:
We developed a 100-item food literacy questionnaire, the IFLQ-19 to comprehensively address the Vidgen & Gallegos theoretical domains and components with good targeting, responsiveness, reliability and validity in a diverse sample of Australian adults.Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Alfabetización en Salud
/
Alimentos
Tipo de estudio:
Prognostic_studies
Límite:
Adult
/
Humans
País/Región como asunto:
Oceania
Idioma:
En
Revista:
Int J Behav Nutr Phys Act
Año:
2022
Tipo del documento:
Article
País de afiliación:
Australia
Pais de publicación:
ENGLAND
/
ESCOCIA
/
GB
/
GREAT BRITAIN
/
INGLATERRA
/
REINO UNIDO
/
SCOTLAND
/
UK
/
UNITED KINGDOM