Sökning: "Selection bias"

Visar resultat 1 - 5 av 184 avhandlingar innehållade orden Selection bias.

  1. 1. Epidemiology of dementia - with particular focus on time trends and methodology

    Författare :Hanna Wetterberg; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Dementia; epidemiology; selection bias; mortality; time trends; Epidemiology; Selection bias; Mortality; Time trends;

    Sammanfattning : Dementia is a clinical syndrome characterised by deterioration in cognitive functions, which causes personal suffering and societal challenges. Studies investigating the incidence, prevalence, and mortality of dementia are needed for the understanding of the societal and economic burden of the disease. LÄS MER

  3. 2. Gruppskillnader i Provresultat : uppgiftsinnehållets betydelse för resultatskillnader mellan män och kvinnor på prov i ordkunskap och allmänorientering

    Författare :Christina Stage; Umeå universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Test bias; item bias; content bias; sex bias; sex differences; vocabulary tests; tests on general knowledge;

    Sammanfattning : The present monograph deals with the problem of sex differences in test results from various angles. Initially, the aim was to investigate whether the use of test results in selection could be considered fair in spite of sex differences in test score averages. LÄS MER

  4. 3. Residential Mobility and Neighbourhood Effects: A Holistic Approach

    Författare :Lina Hedman; Roger Andersson; Irene Molina; Ronald van Kempen; Uppsala universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; neighbourhood effect; residential mobility; selection; method; bias; Social and Economic Geography; Kulturgeografi;

    Sammanfattning : The number of studies estimating neighbourhood effects has increased rapidly during the last two decades. Although results from these studies vary, a majority find at least small effects. LÄS MER

  5. 4. Incumbent Renomination : Accountability and Gender Bias

    Författare :Michal Grahn; Elin Bjarnegård; Johanna Kantola; Uppsala universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; political recruitment; party politics; proportional representation; gender; incumbency; re-selection; accountability; representation; delegation; preference voting; flexible lists; Czech Republic; Slovakia.; Statskunskap; Political Science;

    Sammanfattning : Party recruiters in proportional-representation (PR) systems are forced to do what their majoritarian counterparts are not: they need to rank-order all their candidates on the party ballots based on whom they most wish to get elected. Consequently, new candidates and incumbents alike compete for a limited number of electable ballot slots. LÄS MER

  7. 5. The Effects of Mutation and Selection on the Rate and Pattern of Molecular Evolution in Birds

    Författare :Sofia Berlin; Hans Ellegren; Adam Eyre-Walker; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Molecular genetics; substitution rate; diversity; selection; male mutation bias; birds; Genetik; Genetics; Genetik;

    Sammanfattning : By comparing sequence diversity and divergence on sex chromosomes one can study how the rate of evolution in affected by mutation and/or selection. The rate of mutation in male biased, meaning that relatively more mutations are created in the male germ line than in the female. LÄS MER