Education Commons^™

Investigating The Fit Of The Generalized Graded Unfolding Model (Ggum) When Calibrated To Irt Generated Data From Dominance And Ideal Point Models, Abdulla Alzarouni

College of Education and Human Sciences: Dissertations, Theses, and Student Research

The assessment of model fit in latent trait modelling, better known as item response theory (IRT), is an integral part of model testing if one is to make valid inferences about the estimated parameters and their properties based on the selected IRT model. Though important, the assessment of model fit has been less utilized in IRT research than it should. For example, there have been less research investigating fit for polytomous dominance models such the Graded Response Model (GRM), and to a lesser extent ideal point models such as the Generalized Graded Unfolding Models (GGUM), both in its dichotomous and …

Evaluation Of The Feasibility Of A Two-Method Measurement Design For The Assessment Of Healthy Physical Activity Behavior In Youth, Amelia A. Miramonti

College of Education and Human Sciences: Dissertations, Theses, and Student Research

Purpose: Assess the reliability and validity of self- and parent-report survey responses regarding physical activity (PA), sedentary behaviors, and PA self-efficacy and determine if these data can be combined with objective physical activity monitor data to model the latent construct healthy physical activity behavior (HPAB).

Methods: 126 underserved 4^th-5^th grade students participated in a 12-week after-school nutrition, cooking, and physical activity program (WeCook: Fun with Food and Fitness). Participants and parents (n=103) completed surveys pre- and post-program and participants wore PA monitors for one week at PRE and POST. Unidimensionality and internal consistency reliability were …