Yudiarso, A. et al. 2025. Psychometric properties of the 18-item Indonesian Mental Toughness Questionnaire using the Rasch model and Machine Learning. Psikohumaniora: Jurnal Penelitian Psikologi. 10, 1 (May 2025). DOI:https://doi.org/10.21580/pjpp.v10i1.23214.