Search for dissertations about: "item response theory"

Showing result 1 - 5 of 16 swedish dissertations containing the words item response theory.

  1. 1. Contributions to Kernel Equating

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Björn Andersson; Uppsala universitet.; [2014]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; observed-score test equating; item response theory; R; equipercentile equating; asymptotic standard errors; non-equivalent groups with anchor test design; Statistics; Statistik;

    Abstract : The statistical practice of equating is needed when scores on different versions of the same standardized test are to be compared. This thesis constitutes four contributions to the observed-score equating framework kernel equating. READ MORE

  2. 2. Observed score equating with covariates

    University dissertation from Umeå : Department of Statistics, Umeå university

    Author : Kenny Bränberg; Umeå universitet.; [2010]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Equating; observed score equating; true scores; item response theory; linear equating function; equipercentile equating; kernel equating; covariates; linear regression; mean squared error; SOCIAL SCIENCES Statistics; computer and systems science Statistics; SAMHÄLLSVETENSKAP Statistik; data- och systemvetenskap Statistik; Statistics; statistik;

    Abstract : In test score equating the focus is on the problem of finding the relationship between the scales of different test forms. This can be done only if data are collected in such a way that the effect of differences in ability between groups taking different test forms can be separated from the effect of differences in test form difficulty. READ MORE

  3. 3. Composite Likelihood Estimation for Latent Variable Models with Ordinal and Continuous, or Ranking Variables

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Myrsini Katsikatsou; Uppsala universitet.; [2013]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; latent variable models; factor analysis; structural equation models; Thurstonian model; item response theory; composite likelihood estimation; pairwise likelihood estimation; maximum likelihood; weighted least squares; ordinal variables; ranking variables; lavaan; Statistics; Statistik;

    Abstract : The estimation of latent variable models with ordinal and continuous, or ranking variables is the research focus of this thesis. The existing estimation methods are discussed and a composite likelihood approach is developed. READ MORE

  4. 4. Longitudinal Models for Quantifying Disease and Therapeutic Response in Multiple Sclerosis

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Ana M. Novakovic; Uppsala universitet.; [2017]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; nonlinear mixed-effects models; pharmacometrics; NONMEM; multiple sclerosis; cladribine; EDSS; item response theory; relapse rate; absolute lymphocyte count; total volume T2 lesions; burden of disease; power; sample size; Pharmaceutical Science; Farmaceutisk vetenskap;

    Abstract : Treatment of patients with multiple sclerosis (MS) and development of new therapies have been challenging due to the disease complexity and slow progression, and the limited sensitivity of available clinical outcomes. Modeling and simulation has become an increasingly important component in drug development and in post-marketing optimization of use of medication. READ MORE

  5. 5. A Facet Model of the Logical Operational Structures of Piaget's Theory : Guttman's Facet Design applied to Piaget's Theory

    University dissertation from Stockholm : Stockholm University

    Author : Barbro Bergling; Stockholms universitet.; [1998]
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; facet design; Piaget; operational thinking; Rasch; partial credit model; hierarchical model; psykologi; Psychology;

    Abstract : This thesis explored whether the complex structure of Piaget's theory of operational thinking could be synthesized into a facet model by means of facet design. The aims were: (1) to deduce from detailed conceptual analyses of 12 of Piaget's classical experiments the essential parts of the operational structures (Study I); (2) to explore the internal structure of his constructs in terms of a mapping sentence (Study II); (3) to study the hierarchical structure of the interrelationships between the constructs (Study III); and (4) to apply the facet model in the development of test items (Study II and IV). READ MORE