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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Computerized adaptive testing in knowledge assessment
 Tělupil, Dominik ; Martinková, Patrícia (advisor) ; Omelka, Marek (referee)
In this thesis, we describe and analyze computerized adaptive tests (CAT), the class of psychometrics tests in which items are selected based on the actual estimate of respondent's ability. We focus on the tests based on di- chotomic IRT (item response theory) models. We present critera for item selection, methods for ability estimation and termination criteria, as well as methods for exposure rate control and content balancing. In the analytical part, the effect of CAT settings on the average length of the test and on absoulute bias of ability estimates is investigated using linear regression mo- dels. We provide post hoc analysis of real data coming from real admission test with unknown true values of abilities, as well as simulation study based on the simulated answers of respondents with known true values of ability. In the last chapter of the thesis we investigate the possibilities of analysing adaptive tests in R software and of creating a real CAT. 1
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Order statistics
 Tělupil, Dominik ; Hlávka, Zdeněk (advisor) ; Jurečková, Jana (referee)
The aim of this work is to introduce general notions of theory of order statistics and the method of ranked set sampling (RSS). This statistical method is based on ranking of observed random variables which allows us to con- struct an unbiased estimator with lower variance than by using the method of sim- ple random sampling. In this work we will study estimators of the expected va- lue. Furthermore, we will investigate some properties of estimators based on RSS and some modifications of this method. The thesis contains a chapter about soft- ware simulations which verify the properties of estimators based on RSS. 1
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