Mulyanti, Sri, Suwahono Suwahono, Hanifah Setiowati, and Lis Setiyo Ningrum. 2022. “Validity Analysis Using the Rasch Model in the Development of Alkane Concept Test Instruments”. Jurnal Penelitian Pendidikan IPA 8 (3):1142-47. https://doi.org/10.29303/jppipa.v8i3.1383.