The psychometric properties of the Refractive Status and Vision Profile (RSVP) questionnaire were evaluated using Rasch analysis. Ninety-one myopic patients from a refractive surgery clinic and general optometric practice completed the RSVP. Rasch analysis of the RSVP ordinal data was performed to examine for unidimensionality and item reduction. The traditional Likert-scoring system was compar...

In this study, construct validity of 2 pain behaviour observation measurement instruments for young children aged 1 to 56 months (mean age was 20 months) with burns is assessed by using Rasch analysis. The Rasch model, wherein data should meet the model expectations, assumes that an instrument measures one unidimensional construct, and focuses on the items of measurement instruments. The Pain O...

A performance-based measure for assessing executive functions (EF) is useful to understand patients' real life performance of EF. This study aimed to develop a performance-based measure of executive functions (PEF) based on the Lezak model and to examine psychometric properties (i.e., unidimensionality and reliability) of the PEF using Rasch analysis in patients with schizophrenia. We developed...

PURPOSE To develop and validate a questionnaire for the measurement of the impact of contact lenses on quality of life (QoL): The Contact Lens Impact on Quality of Life (CLIQ) Questionnaire. METHODS The questionnaire was developed and validated using conventional methods and Rasch analysis to assure content validity, repeatability, construct validity, and low respondent burden. Item identific...

Background: The biases jurors possess may influence everything from the interpretation of case evidence to impressions of the defendant to, ultimately, verdict and recognition of this has led to a number of juror attitude scales attempting to tap into important biases. A common ideology discussed in legal research is that individuals attitudes toward the law and the legal system differ along a ...

Random graphs are matrices with independent 0–1 elements with probabilities determined by a small number of parameters. One of the oldest models is the Rasch model where the odds are ratios of positive numbers scaling the rows and columns. Later Persi Diaconis with his coworkers rediscovered the model for symmetric matrices and called the model beta. Here we give goodness-of-fit tests for the m...

The purpose of this study was to evaluate the psychometric properties of a newly developed instrument intended to measure faculty competence as it pertains to their role as advisors, particularly in medical and professional programs. A total of 166 students completed the Faculty Advisor’s Skills and Behaviors Inventory (FASBI). The psychometric properties of the FASBI were evaluated using the R...

Four methods were studied for setting a standard on a written examination containing several clinical discipline subtests. The NBME method yielded the most consistent estimate. The Angoff and Ebel methods yielded slightly less consistent estimates. All estimates were more consistent when computed as the average of discipline standards rather than the judges' personal standards. All but the Esse...

In the present paper a model for describing dynamic processes is constructed by combining the common Rasch model with the concept of structurally incomplete designs. This is accomplished by mapping each item on a collection of virtual items, one of which is assumed to be presented to the respondent dependent on the preceding responses and/or the feedback obtained. It is shown that, in the case ...

This article discusses the application of Rasch analysis to assess the internal validity of a four sub-scale VARK (Visual, Auditory, Read/Write and Kinaesthetic) learning styles instrument. The results from the analysis show that the Rasch model fits the majority of the VARK questionnaire data and the sample data support the internal validity of the four sub-constructs at 1% level of significan...