Powerpoint Presentation at AERA 2017 Annual Meeting by NIEER Assistant Research Professor Zijia Li Summary Findings: The unidimensional model provides a parsimonious and
near precise solution for the dimensionality assessment of the 32 - item Preschool OnlineCOR and the 8 - item COR - ST The graded response model showed better fit than the reduced graded response model for the 32 - item...