“Principal Component Analysis and Exploratory Factor Analysis of the Mechanical Waves Conceptual Survey”. JP3I (Jurnal Pengukuran Psikologi dan Pendidikan Indonesia) 11, no. 2 (November 25, 2022): 209–225. Accessed April 17, 2026. https://journal.uinjkt.ac.id/jp3i/article/view/27488.