Agustini, S., K. Arafah, D. K. Sanusi, S. Salmah, R. Faisal, and N. Fitria. “Analysis of the Difficulty Level of Physics Cognitive Test Items Using the Rasch Approach: Implementation of Analysis With R Software”. Priviet Social Sciences Journal, vol. 6, no. 4, Apr. 2026, pp. 433-44, doi:10.55942/pssj.v6i4.1036.