Questionnaire Data from the PIRLS 2006 study in Italy provided a number of indices in order to summarize factors of educational context influencing reading achievement. The aim of the present secondary study is to explore the relationship between these indices at school as well as pupil levels and the Rasch-scaled score for overall reading achievement. A multilevel analysis was conducted using ...

PURPOSE To explore the psychometric properties of the Impact of Vision Impairment scale (IVI) by using Rasch analysis. METHODS Three hundred fourteen first-time referrals to low-vision clinics completed the 32-item IVI. The data were Rasch-analyzed with a partial credit model using RUMM2020 software (RUMM Laboratory, Perth, WA, Australia). The overall fit of the model, response scale, individ...

BACKGROUND The Personal Care Participation Assessment and Resource Tool (PC-PART) is a 43-item, clinician-administered assessment, designed to identify patients' unmet needs (participation restrictions) in activities of daily living (ADL) required for community life. This information is important for identifying problems that need addressing to enable, for example, discharge from inpatient sett...

Das Gesundheitswesen ist durch eine geringe Arbeitsteilung und jährlich steigende Kosten geprägt. Zur Steigerung von Effektivität und Effizienz haben andere Branchen eine hohe Arbeitsteilung und ausgeprägte Vernetzung realisiert, insbesondere durch den Einsatz von IT-Mitteln. Im Gesundheitswesen geht die Vernetzung jedoch nur sehr langsam und nicht auf breiter Front voran. Vernetzungsansätze au...

This study examined the influence of rater training and scoring context on the manifestation of rater effects in a group of trained raters. 120 raters participated in the study and experienced one of three training/scoring contexts: (a) online training in a distributed scoring context, (b) online training in a regional scoring context, and (c) stand-up training in a regional context. After trai...

BACKGROUND The study aimed at presenting normative data for both parallel forms of the "Rasch-based Depression Screening (DESC)", to examine its Rasch model conformity and convergent and divergent validity based on a representative sample of the German general population. METHODS The sample was selected with the assistance of a demographic consulting company applying a face to face interview ...

BACKGROUND Although the Functional Assessment of Cancer Therapy--General questionnaire (FACT-G) has been validated few studies have explored the factor structure of the instrument, in particular using non-sample dependent measurement techniques, such as Rasch Models. Furthermore, few studies have explored the relationship between item fit to the Rasch Model and clinical utility. The aim of this...

Building on Wright and Masters (1982), several Rasch estimation methods are briefly described, including Marginal Maximum Likelihood Estimation (MMLE) and minimum chi-square methods. General attributes of Rasch estimation algorithms are discussed, including the handling of missing data, precision and accuracy, estimate consistency, bias and symmetry. Reasons for, and the implications of, measur...

In order to test the effectiveness of the implementation of the Dimensions of Learning Program in an Australian independent boys school, data from the Australian Schools Science Competition over a number of years from this school were analysed. Subjects were secondary school students from the school over a period from 1994 until 1998 from Grades 8 to 12. The data were Rasch scaled and this allo...

on comparing responses to pairs of items irrespective of other items. The pseudo-likelihood method is comparable to Fischer’s (1974) Minchi method. A simulation study found that the pseudo-likelihood estimates and their (estimated) standard errors were comparable to conditional and marginal maximum likelihood estimates. The method is extended to estimate parameters of the linear logistic test m...