Sökning: "polytomous"

Hittade 4 avhandlingar innehållade ordet polytomous.

  1. 1. Elektriska flickor och mekaniska pojkar : Om gruppskillnader på prov - en metodutveckling och en studie av skillnader mellan flickor och pojkar på centrala prov i fysik

    Författare :Kristian Ramstedt; Umeå universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Differential item functioning; DIF; Mantel-Haenszel; polytomous; non-uniform; item bias; purification; P-SIBTEST; physics; electricity; mechanics; gender;

    Sammanfattning : This dissertation served two purposes. The first was to develop a method of detecting differential item functioning (DIF) within tests containing both dichotomously and polytomously scored items. LÄS MER

  3. 2. Short-term and Long-term Exposure to Air pollution and Stroke risk

    Författare :Anna Oudin; Avdelningen för arbets- och miljömedicin; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Long-term effects; Two-phase methods; Hemorrhagic stroke; Ischemic stroke; Short-term effects; Hospital admissions; Air Pollution;

    Sammanfattning : Background: Stroke is a major cause of mortality and morbidity across the world. Air pollution has become an acknowledged risk factor for stroke, especially for acute effects. There is less support for effects by chronic exposure due to the methodological challenges inherent in such studies. LÄS MER

  4. 3. Socioeconomic consequences of obesity : population-based longitudinal studies of Swedish men

    Författare :Nina Karnehed; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : The overall aim of the thesis was to study if Swedish obese male adolescents become socioeconomicly disadvantaged in later life. Among Swedish men born 1951-79, who went through military conscription examination at age 18-20 years, the associations between obesity and attained education, occupation, income, and disability pension have been studied. LÄS MER

  5. 4. Intelligence and cardiovascular health : epidemiological studies of swedish men

    Författare :Karin Modig Wennerstad; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Aim: A first aim of this thesis was to examine the relationship between intelligence in early adulthood and health outcomes, mainly cardiovascular morbidity and mortality, CVD, later in life using register-based data on Swedish men. A second aim was to increase understanding of the pathways between intelligence and CVD morbidity/mortality by studying the association between intelligence and smoking habits and nicotine dependence, who might act as mediators of the association between intelligence and mortality. LÄS MER