“Rasch Model Applications in Validity and Reliability Testing of Educational Measurement Instruments: A PRISMA-Guided Systematic Literature Review (2020–2026)”. Nusantara: Jurnal Pendidikan Indonesia, vol. 6, no. 4, Oct. 2026, pp. 877-96, https://doi.org/10.62491/njpi.2026.v6i4-2.