1. DEALING WITH TESTLET-STRUCTURED DATA: EFFECT OF SAMPLE SIZE ON IRT MODEL SELECTION Open Access Author: Li, Xinyue Title: DEALING WITH TESTLET-STRUCTURED DATA: EFFECT OF SAMPLE SIZE ON IRT MODEL SELECTION Graduate Program: Educational Psychology Keywords: item response theoryunidimensional modelbifactor modelmodel selectiontestlet data File: Download xinyue_thesis_0405.pdf Committee Members: Pui-Wa Lei, Thesis Advisor/Co-Advisor