Hidayat, R.; Setyawati, H.; Mukarromah, S. B. Preliminary Psychometric Evidence for PLAYfun and PLAYself Among Indonesian Elementary School Students: Item Validity and Internal Consistency. Phys. Educ. Learn. Teach. Assess. 2026, 1 (1), 8-14. https://doi.org/10.68536/pelta.v1i1.17.