OBJECTIVE The aim of this study was to investigate unidimensionality and differential item functioning of the SF-36 physical functioning scale (PF10) in patients with various neurological disorders. PATIENTS PATIENTS post-stroke (n = 198), with multiple sclerosis (n = 151) and amyotrophic lateral sclerosis (n = 193) participated. METHODS Unidimensionality of the PF10 within the patient grou...

PURPOSE We compare two methods of analysis for Rasch scoring pre- to postintervention data: Rasch lookup table versus de novo stacked Rasch analysis using the Adult Strabismus-20 (AS-20). METHODS One hundred forty-seven subjects completed the AS-20 questionnaire prior to surgery and 6 weeks postoperatively. Subjects were classified 6 weeks postoperatively as "success," "partial success," or "...

Information Systems (IS) research frequently uses survey data to measure the interplay between technological systems and human beings. Researchers have developed sophisticated procedures to build and validate multi-item scales that measure latent constructs. Most studies use classical test theory (CTT), which suffers from several theoretical shortcomings. We discuss these problems and present i...

This study describes errors and misconceptions of pre-service primary teachers, at course entry, across the mathematics curriculum. A Rasch analysis of a multiple-choice mathematics test uncovered patterns of errors in a cohort of 426 students at the beginning of their teacher education course. These errors were of varying sophistication. A map of an individual’s errors is also presented and we...

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This paper reports the partial results of a study using the Hybrid Behaviourally Anchored Rating Scale (Hybrid BARS) to identify the competencies considered essential for effective performance in a university e-learning environment. The competencies were developed in accordance with social constructivist principles and in the context of a Learning Management System. Students and staff at the un...

This paper reports on a study of high school students' understanding of statistics. Grade 7 to 12 students (n=180) completed an open-ended written response task about data description and prediction. Follow-up interviews were undertaken with 15 students. The SOLO Taxonomy and the Rasch Model were used to analyse the polychotomously categorised data. This analysis indicated student responses fel...

Crowdsourcing requires new strategies to evaluate the workers involved as well as the . Using customer feedback data, we introduce multi-facetted Rasch scaling as an evaluation technique to assess the contributions of workers and products simultaneously within a single coherent measurement framework. Based on a data set of about 250,000 customers who rated nearly 115,000 products, for a total o...

Vol. 47, No. 3, 2018 This study investigated the interaction of disciplinary and interdisciplinary learning in a teamtaught, first-year, interdisciplinary sustainability course. We surveyed (pre/post) both STEM (science, technology, engineering, and mathematics) and non-STEM majors (N = 241), assessing attitudes and content knowledge. Responses were analyzed using factor analysis, classical tes...

A two-systems model of moral judgment proposed by Joshua Greene holds that deontological moral judgments (those based on simple rules concerning action) are often primary and intuitive, and these intuitive judgments must be overridden by reflection in order to yield utilitarian (consequence-based) responses. For example, one dilemma asks whether it is right to push a man onto a track in order t...