Measurement of Psychometric Properties Numerical Aptitude Assessment Scale for Prospective High School Students: A Rasch Model Analysis

Abstract

Developing structured test instruments is essential in forming a measurable and consistent ability assessment construct. This study examines the psychometric properties of the numerical aptitude test instrument (NAPTIN) utilizing Rasch model analysis to evaluate standardized numerical aptitude assessment test instruments for prospective high school (PHS) students based on validation and construct reliability. Data was collected using an online survey of 228 PHS students. The Rasch model analyses person and item fit, item measure, dimensionality and local independence testing, reliability, and differential item functioning. The results showed that NAPTIN had appropriate and consistent items for measuring the numerical aptitude of PHS students based on gender and school type. This study recommends a systematic measurement tool for researchers. Another contribution is measurement instruments for Indonesian schools and policymakers to choose student program specialties.