Reliability in the Rasch model
نویسندگان
چکیده
This paper deals with the reliability of composite measurement consisting of true-false items obeying the Rasch model. A definition of reliability in the Rasch model is proposed and the connection to the classical definition of reliability is shown. As a modification of the classical estimator Cronbach’s alpha, a new estimator logistic alpha is proposed. Finally, the properties of the new estimator are studied via simulations in the Rasch model.
منابع مشابه
Psychometric properties of Geriatric Depression Scale (GDS) among elderlies in Tehran using multidimensional Rasch model
Introduction and purpose: The purpose of this study was to examine the psychometric properties of the Geriatric Depression Scale (GDS) when applied to the elderly of Tehran. This research is applied-developmental, descriptive and quantitative. Materials and Methods: The research population was Tehrani elderlies, among which 400 people responded to the Geriatric Depression Scale voluntarily and...
متن کاملOn the Multivariate Rasch Model: Assessing Collaboration in Multiple Choice Tests
We examine the Rasch model for latent structure para- meters in binary and multiple response questionnaires and develop methodologies and data-analytic tools for assessing collaboration/che- ating in multiple choice tests
متن کاملApplication of Rasch model for evaluating the quality of life in blind war veterans
Background: Quality of life evaluates the general well-being of individuals and it can be considered as one of the important aspects in programming and giving service to disabled people. Blindness is one of the most important kinds of physical disability that has a direct effect on quality of life, so t his study aimed to explore how war blindness influences the quality of life . Methods: I...
متن کاملRater Errors among Peer-Assessors: Applying the Many-Facet Rasch Measurement Model
In this study, the researcher used the many-facet Rasch measurement model (MFRM) to detect two pervasive rater errors among peer-assessors rating EFL essays. The researcher also compared the ratings of peer-assessors to those of teacher assessors to gain a clearer understanding of the ratings of peer-assessors. To that end, the researcher used a fully crossed design in which all peer-assessors ...
متن کاملApplication of Rasch Model in Evaluating the Reliability and Quality of Examination Paper for Object-oriented Design Course
Exam has been used enormously as an assessment tool to measure students’ academic performance in most of the higher institutions in KSA. A good quality of a set of constructed items/questions on mid and final exam would be able to measure both students’ academic performance and their cognitive skills. We adopt Rasch Model to evaluate the reliability and quality of the first mid exam questions f...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Kybernetika
دوره 43 شماره
صفحات -
تاریخ انتشار 2007