Measuring Critical Thinking in Physics: A Rasch Analysis of Instrument Quality and Gender Equivalence

This study seeks to evaluate the quality of a Critical Thinking Skills (CTS) instrument for high school students on dynamic fluids, focusing on reliability, item validity, and respondent ability assessment using the Rasch model. This research utilized a quantitative technique with a descriptive design. The research sample comprised 200 11th-grade science students from several high schools in Manggarai Regency, East Nusa Tenggara, Indonesia, of whom 140 were female, and 60 were male. Data were an