Ji Seung Yang

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AIM The purpose of the present study was to evaluate the efficacy of two different exercise types, rhythmic exercise designed from local music and dance (RE) and walking exercise (WE), in terms of exercise participation and physical function changes in older adults over a period of 12 weeks. METHODS Exercise participation was assessed through the(More)
Title of Document: SENSITIVITY ANALYSIS OF STRUCTURAL PARAMETERS TO MEASUREMENT NONINVARIANCE: A BAYESIAN APPROACH Yoon Jeong Kang, Doctor of Philosophy, 2015 Directed By: Professor Gregory R. Hancock Department of Human Development and Quantitative Methodology Most previous studies have argued that the validity of group comparisons of structural parameters(More)
BACKGROUND Adolescent idiopathic scoliosis is a prevalent orthopedic problem in children ages 10 to 16years. Although genetic, physiological and biomechanical factors are considered to contribute to the onset and progression of adolescent idiopathic scoliosis, the underlying mechanisms are not yet clear. The purpose of this study was to investigate the(More)
In most item response theory applications, model parameters need to be first calibrated from sample data. Latent variable (LV) scores calculated using estimated parameters are thus subject to sampling error inherited from the calibration stage. In this article, we propose a resampling-based method, namely bootstrap calibration (BC), to reduce the impact of(More)
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