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Visar resultat 1 - 5 av 100 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. In search of the missing bias : Virtual reality based attentional bias modification for social anxiety

    Författare :Lichen Ma; Per Carlbring; Martien Schrooten; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; attentional bias; attentional bias modification; social anxiety; virtual reality; dot-probe; attentional training; mixed reality; Psychology; psykologi;

    Sammanfattning : Attentional bias modification (ABM) aims to attenuate social anxiety by directly modifying the underlying bias that generates and maintains problematic anxiety. Mixed results from previous ABM studies have spurred efforts to boost its effectiveness by introducing more robust bias modification protocols and new technologies. LÄS MER

  3. 2. Bias approximation and reduction in vector autoregressive models

    Författare :Tomas Brännström; Handelshögskolan i Stockholm; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES;

    Sammanfattning : In the last few decades, vector autoregressive (VAR) models have gained tremendous popularity as an all-purpose tool in econometrics and other disciplines. Some of their most prominent uses are for forecasting, causality tests, tests of economic theories, hypothesis-seeking, data characterisation, innovation accounting, policy analysis, and cointegration analysis. LÄS MER

  4. 3. Cost efficency of nonresponse rate reduction efforts : an evaluation approach

    Författare :Sara Westling; Bengt Swensson; Risto Lehtonen; Örebro universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; nonresponse bias; follow-ups; response distribution; resource allocation; cost efficiency; evaluation; nonresponse error; Monte Carlo simulations; Statistics; Statistik; Statistics; Statistik;

    Sammanfattning : Nonresponse, the failure to obtain complete measurement on all sample elements, is an increasing problem in sample surveys. Efforts to reduce the nonresponse rate are expensive and their effect may not be as desired. LÄS MER

  5. 4. Local and weighted regression. Bias reduction and model validation

    Författare :Astrid Lundgren; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : Nonlinear systems might be estimated, using local linear models. If the estimation data is corrupted by strongly colored noise the local model will have a bias error. In linear system identification the bias error can be reduced by using instrumentalvariable methods. LÄS MER

  7. 5. What is a life worth? : methodological issues in estimating the value of a statistical life

    Författare :Mikael Svensson; Lars Hultkrantz; Magnus Johannesson; Örebro universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Value of a statistical life; scale bias; cognitive ability; hypothetical bias; cost-benefit analysis; calibration; certainty approach; attitude theory; seat belt use; bicycle helmet use; altruism; mortality rates; acute myocardial infarction; unemployment.; Economics; Nationalekonomi; Economics; Nationalekonomi;

    Sammanfattning : This thesis addresses methodological issues in estimating the value of a statistical life (VSL). Two main approaches have been used to estimate the VSL, the indirect and direct methods; the indirect method is based on revealed preferences, such as the wage premium demanded for a risky job. LÄS MER