Development and validation of nutrition knowledge test for high school students using a novel study design: A Rasch analysis

Introduction: The creation of a high-quality, valid, and reliable knowledge test for high school students will contribute to establishing dietary programs more conscious, for individuals and society. The aim of the study is to develop a valid and reliable nutrition knowledge test for high school students. Methodology: Data were collected from 346 high school students age from 14 to 18 years. Rasch modelling was used for validating the test. The expert group followed a five-step test developing process and developed 22 multiple-choice items. Results: Findings indicated that 20 of 22 test items showed high internal consistency and reliability for both test items and person participating in this study. The wright map indicated a well distributed item difficulties and relatively good person abilities. Conclusions: It is thought that the study findings obtained through the Rasch modelling and the knowledge test created will be a guiding tool in respect of multidimensionality, validity, and reliability for the concept, such as nutrition which is crucial in human life.