Canada Thompson|Rebecca Byrne|Jean Adams|Helen A. Vidgen
Development, validation and item reduction of a food literacy questionnaire (IFLQ-19) with Australian adults
Queensland University of Technology|Queensland University of Technology|MRC Epidemiology Unit|University of Cambridge|Queensland University of Technology
food literacy theorised improve diet quality nutrition behaviours social connectedness food security definition conceptualisation vidgen gallegos consisting 11 theoretical components within four domains planning managing selecting preparing eating currently highly cited framework however valid reliable questionnaire needed comprehensively measure conceptualisation therefore study draws existing item pools develop comprehensive food literacy questionnaire using item response theoryfive hundred australian adults recruited study 1 refine food literacy item pool using principal component analysis pca item response theory irt involved detailed item analysis targeting responsiveness validity reliability another 500 participants recruited study 2 replicate item analysis validity reliability refined item pool 250 participants recompleted food literacy questionnaire determine testretest reliabilitythe pca saw 171item pool reduced 100items across 19 statistical components food literacy thresholds 26 items combined responses food literacy questionnaire ordered thresholds targeting acceptable item locations 001 153 appropriateness measurement model n 92 expected responses responsiveness met outfit meansquares msq 048142 validity high person item separation 099 testretest icc 21 055088 scores reliabilitywe developed 100item food literacy questionnaire iflq19 comprehensively address vidgen gallegos theoretical domains components good targeting responsiveness reliability validity diverse sample australian adults