Sökning: "latent variables"

Visar resultat 1 - 5 av 88 avhandlingar innehållade orden latent variables.

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

    Författare :Myrsini Katsikatsou; Fan Yang-Wallentin; Irini Moustaki; Karl Gustav Jöreskog; Ruggero Bellio; Uppsala universitet; []
    Nyckelord :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;

    Sammanfattning : 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. LÄS MER

  3. 2. Latent variable models for longitudinal twin data

    Författare :Annica Dominicus; Juni Palmgren; Nancy L. Pedersen; Michael G. Kenward; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Latent variable models; twin models; variance components; change point models; non-ignorable nonresponse; likelihood ratio tests; Mathematical statistics; Matematisk statistik;

    Sammanfattning : Longitudinal twin data provide important information for exploring sources of variation in human traits. In statistical models for twin data, unobserved genetic and environmental factors influencing the trait are represented by latent variables. In this way, trait variation can be decomposed into genetic and environmental components. LÄS MER

  4. 3. Participation and performance in primary schooling : a study of equality of educational opportunity in Mauritius

    Författare :Vinayagum Chinapah; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Mauritius; Primary Education; Educational Equality; School Participation; Scholastic Performance; Learning Environments; LISREL Method; PLS Method; Latent Variables; Path Analysis;

    Sammanfattning : The aim of the study is to examine the extent to which policies formulated to ensure equality of educational opportunity have been implemented at the primary school level in Mauritius.Universal free primary education was achieved during the early 1970s. LÄS MER

  5. 4. Learning about the unobservable : The role of attitudes, measurement errors, norms and perceptions in user behaviour

    Författare :Juan Manuel Lorenzo Varela; Yusak Susilo; R. Daniel Jonsson; Maria Börjesson; Soora Rasouli; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Attitudes; Measurement errors; Discrete choice analysis; Latent variables; Model misspecification; Normative beliefs; Rail factor; User perceptions; Social norms; Value of travel time savings; Transportvetenskap; Transport Science;

    Sammanfattning : Unobservable factors are important to understand user behaviour. Moreover, they contain information to help design services that willsolve today’s challenges. Yet, we have barely scratched the surface ofthe underlying mechanisms ruling user behaviour. LÄS MER

  7. 5. Exploring Paths of Justice in the Digital Healthcare : A Socio-Legal Study of Swedish Online Doctors

    Författare :Peter Bergwall; Rättssociologiska institutionen; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; rättssociologi; ehealth; critical realism; distributive justice; ethical principles in healthcare; free choice; healthcare demands; healthcare law and ethics; healthcare need; Kry; latent variables; mHealth; Alan Norrie; online doctors; online survey; PLS path modelling; PLS-SEM; privacy calculus; procedural justice; retail health; SmartPLS; sociology of law; Swedish healthcare; telehealth; quasi-market;

    Sammanfattning : Online doctor services, healthcare provided via smartphone apps, have gone from being peripheral to seriously challenging the conventional Swedish way of providing healthcare services. The accessibility of online doctors is unsurpassed but all patient groups have not gotten better access to healthcare thanks to online doctors. LÄS MER