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.

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