There is a close relationship between chemistry and physics in the context of atomic structure, which is usually covered in both courses at the secondary-school level. However, little emphasis has been put on determining whether the students developed correct understanding of the quantum structure when they studied it in both the courses. The…

The study aims to examine whether differential item function is displayed in three different test forms that have item orders of random and sequential versions (easy-to-hard and hard-to-easy), based on Classical Test Theory (CTT) and Item Response Theory (IRT) methods and bearing item difficulty levels in mind. In the correlational research, the…