Sökning: "Latent variables"

Visar resultat 11 - 15 av 88 avhandlingar innehållade orden Latent variables.

  1. 11. Estimation of Nonlinear Latent Variable and Mixture Models

    Författare :Johan Vegelius; Shaobo Jin; Fan Yang-Wallentin; Melanie Wall; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; structural equation modeling; semiparametric; EM algorithm; adaptive Gauss-Hermite quadrature approximation; Laplace approximation; zero inflation; Statistics; Statistik;

    Sammanfattning : In this thesis methods are developed for estimation of latent variable models. In particular nonlinear structural equation models are estimated in the presence of ordinal data and mixture models for count data. LÄS MER

  3. 12. Latent variable models for multivariate survival and count data

    Författare :Samuli Ripatti; David Clayton; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; matematisk statistik; Mathematical Statistics;

    Sammanfattning : This thesis consists of three papers on multivariate frailty models and one paper on the use of latent class models in genetic association studies. The common theme through the four papers is the use of latent variables to capture complex dependence structures in the data. LÄS MER

  4. 13. Affective disorders : multivariate investigations of clinical and biological variables

    Författare :Björn Wahlund; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Affective disorders; psychiatric symptoms; classification; unipolardepression; bipolar disorder; cortisol; melatonin; monoamine oxidase; principle componentanalysis.;

    Sammanfattning : This thesis is a methodological and clinical investigation of patients with affective disorders. The goal of the study was to determine the extent to which biological and clinical measures may cluster clinical subpopulations. Analytical and statistical procedures were applied for this purpose. LÄS MER

  5. 14. Post-traumatic Stress Disorder – Assessment of current diagnostic definitions

    Författare :Kristina Bondjers; Filip Arnberg; Mimmie Willebrand; Mark Shevlin; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; PTSD; Complex PTSD; Post-traumatic Stress; Psychological assessment; DSM-5; ICD-11; Confirmatory factor analysis; Latent class analysis; Structural equation modelling; psychometric; psychiatric diagnoses; Psychiatry; Psykiatri;

    Sammanfattning : Post-traumatic stress disorder (PTSD) is a debilitating condition that may arise after exposure to shocking, frightening, or dangerous events. Hallmark symptoms are re-experiencing, avoidance, and hyperarousal. Other common symptoms are more ancillary and overlap with other psychiatric disorders (e.g. LÄS MER

  7. 15. Law and Social Exclusion : The functions and dysfunctions of the Swedish legal system in light of overindebtedness among immigrants

    Författare :Davor Vuleta; Rättssociologiska institutionen; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Debt collection; Debtor; Economic security; Financial exclusion; Immigrants; Law; Legal cultrue; Manifest and latent; Middle range theory; Migration; Mixed methods; Over-indebtedness; Register data; Robert Merton; Social exclusion; Socio-economic status; Sociology of law; Sweden; Swedish Enforcement Authority; Functions and dysfunctions;

    Sammanfattning : In terms of its total population, Sweden is one of the countries with the highest proportion of immigrants in the EU. Several factors are critical in integrating immigrants, especially their economic security in a new country. This thesis examines the relationship between law enforcement and economic security for over- indebted immigrants. LÄS MER