How Many Is Enough to Calibrate Mixed Format of 3PL and GPCM?

• In Event: Electronic Board Session III

Abstract

This study intends to investigate the effects of sample size on mixed IRT model parameter calibration (3PL and generalized partial credit model). The performance of three software packages (PROC IRT, IRTPRO, and mirt) will be compared. To do so, a simulation study will be conducted to evaluate recovery of parameters.

Authors

• Hye-Jeong Choi, Human Resources Research Organization

• Dipendra Subedi, Pearson

• Yufeng Berry, MINNESOTA DEPARTMENT OF EDUCATION

• Meng Fan, Human Resources Research Organization

• Gerald Griph, PEARSON

• Changjiang Wang, PEARSON

• Yvette M Nemeth, HumRRO