The study aimed to investigate whether certain physical self-concept predicted exercise dependence among young regular exercisers using a multidimensional prospective. One hundred fifty-two regular gym users, 78 were male and 74 female, completed: Physical Self-Description Questionnaire (PSDQ), Exercise Dependence Scale21 (EDS-21), and Eating Disorder Inventory–2 (EDI-2). Correlation and regres...

PURPOSE To explore the underlying dimensions of the Barriers and Motivators Questionnaire that is used to assess barriers to and motivators of physical activity experienced by recipients of solid organ transplantation and thereby improve the application in research and clinical settings. METHOD A cross-sectional study was performed in recipients of solid organ transplantation (n = 591; median...

Title of Dissertation: THE MULTIDIMENSIONAL GENERALIZED GRADED UNFOLDING MODEL FOR ASSESSING CHANGE IN REPEATED MEASURES Weiwei Cui Doctor of Philosophy, 2008 Directed by: Associate Professor James S. Roberts Department of Psychology A multidimensional extension of the generalized graded unfolding model for repeated measures (GGUM-RM) is introduced and applied to analyze attitude change across ...

When measuring participant-reported attitudes and outcomes in the behavioral sciences, there are many instances when the common measurement assumption of unidimensionality does not hold. In these cases, the application of a multidimensional measurement model is both technically appropriate and potentially advantageous in substance. In this paper, we illustrate the usefulness of a multidimension...

Multiple imputation under a two-way model with error is a simple and effective method that has been used to handle missing item scores in unidimensional test and questionnaire data. Extensions of this method to multidimensional data are proposed. A simulation study is used to investigate whether these extensions produce biased estimates of important statistics in multidimensional data, and to c...