1. IGNORING HIERARCHICAL DATA STRUCTURE IN ITEM RESPONSE THEORY ANALYSES: IMPLICATIONS FOR EDUCATIONAL AND PSYCHOLOGICAL RESEARCH Open Access Author: Nolan, Katherine A Title: IGNORING HIERARCHICAL DATA STRUCTURE IN ITEM RESPONSE THEORY ANALYSES: IMPLICATIONS FOR EDUCATIONAL AND PSYCHOLOGICAL RESEARCH Graduate Program: Educational Psychology Keywords: NestedMultilevel ModelingIRTHierarchical File: Download NolanDissertationFinal.pdf Committee Members: Pui-Wa Lei, Dissertation Advisor/Co-AdvisorPui-Wa Lei, Committee Chair/Co-ChairHoi Suen, Committee MemberWayne Osgood, Committee MemberMosuk Chow, Outside Member