International Online Journal of Primary Education, vol.10, no.1, pp.160-179, 2021 (Peer-Reviewed Journal)
The study determines the conceptual understanding levels of primary school students on the concept of light according to the
Rasch Model with a Four-tier Light Conceptual Understanding Test (LCUT). The participants were 355 (164 girls and 191
boys) primary school students studying at a public school in Izmir city center. In the study, the Rasch Model, which is
included in the Latent Trait Theory, was used. Also, the data regarding the answers given and the level of confidence in the
responses were associated with the Rasch analysis of LCUT. The results of Rasch analysis showed that LCUT was in full
harmony in the context of infit, outfit, and point measurement correlation statistics, and is a valid and reliable measurement
tool for conceptual understanding. Moreover, these results explained that the students' average conceptual understanding
ability regarding the Light unit was above the average item difficulty.