Development and Initial Psychometric Evaluation of a Web-Based Rubric for Assessing Creativity in Mathematics Learning Media Design

This study aimed to develop and conduct an initial psychometric evaluation of GoSkill, a web-based assessment instrument specifically designed to measure student creativity within Mathematics Learning Media courses. This innovation addresses the growing necessity for technology-enhanced tools that support systematic and objective evaluation of creative performance in higher education. Employing a Research and Development (R&D) framework, the research encompassed stages of needs analysis, instrument design, product development, expert validation, limited field testing and reliability analysis. The study involved 84 mathematics education students enrolled in the Mathematics Learning Media course at four universities in East Java, Indonesia: University of PGRI Jombang, KH. A. Wahab Hasbullah University, Islamic University of Majapahit, and Wahidiyah University. Content validity, assessed by four experts in instructional technology, yielded a Scale-level Content Validity Index (S-CVI/Ave) of 0.89 indicating good content validity. Construct validity was further examined through Exploratory Factor Analysis (EFA), which confirmed a unidimensional structure with a single dominant factor explaining 53.45% of the total variance (KMO = 0.76). Item factor loadings ranged from 0.62 to 0.81, while reliability analysis demonstrated high internal consistency (Cronbach’s alpha = 0.865; McDonald’s omega = 0.87). These findings suggest that GoSkill was a feasible instrument for the formative assessment of student creativity in designing mathematics learning media. However, as this study represents an initial validation, further research utilizing advanced analytical techniques and broader, more diverse samples is required to establish more comprehensive psychometric evidence for the instrument.