1. Reliability in the Rasch model
- Creator:
- Martinková, Patrícia and Zvára, Karel
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Cronbach´s alpha, Rasch model, and reliability
- Language:
- English
- Description:
- 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 \textit{Cronbach's alpha}, a new estimator \textit{logistic alpha} is proposed. Finally, the properties of the new estimator are studied via simulations in the Rasch model.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public