@article{LenhardLenhardGary2019,
  author    = {Lenhard, Alexandra and Lenhard, Wolfgang and Gary, Sebastian},
  title     = {Continuous norming of psychometric tests: A simulation study of parametric and semi-parametric approaches},
  series = {PLoS ONE},
  volume    = {14},
  journal   = {PLoS ONE},
  number    = {9},
  doi       = {10.1371/journal.pone.0222279},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-200480},
  pages     = {e0222279},
  year      = {2019},
  abstract  = {Continuous norming methods have seldom been subjected to scientific review. In this simulation study, we compared parametric with semi-parametric continuous norming methods in psychometric tests by constructing a fictitious population model within which a latent ability increases with age across seven age groups. We drew samples of different sizes (n = 50, 75, 100, 150, 250, 500 and 1,000 per age group) and simulated the results of an easy, medium, and difficult test scale based on Item Response Theory (IRT). We subjected the resulting data to different continuous norming methods and compared the data fit under the different test conditions with a representative cross-validation dataset of n = 10,000 per age group. The most significant differences were found in suboptimal (i.e., too easy or too difficult) test scales and in ability levels that were far from the population mean. We discuss the results with regard to the selection of the appropriate modeling techniques in psychometric test construction, the required sample sizes, and the requirement to report appropriate quantitative and qualitative test quality criteria for continuous norming methods in test manuals.},
  language  = {en}
}
@article{SchoenbergerLudwigWildneretal.2013,
  author    = {Sch{\"o}nberger, Katharina and Ludwig, Maria-Sabine and Wildner, Manfred and Weissbrich, Benedikt},
  title     = {Epidemiology of Subacute Sclerosing Panencephalitis (SSPE) in Germany from 2003 to 2009: A Risk Estimation},
  series = {PLoS ONE},
  volume    = {8},
  journal   = {PLoS ONE},
  number    = {7},
  doi       = {10.1371/journal.pone.0068909},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-130089},
  pages     = {e68909},
  year      = {2013},
  abstract  = {Subacute sclerosing panencephalitis (SSPE) is a fatal long-term complication of measles infection. We performed an estimation of the total number of SSPE cases in Germany for the period 2003 to 2009 and calculated the risk of SSPE after an acute measles infection. SSPE cases were collected from the Surveillance Unit for Rare Paediatric Diseases in Germany and the Institute of Virology and Immunobiology at the University of W{\"u}rzburg. The total number of SSPE cases was estimated by capture-recapture analysis. For the period 2003 to 2009, 31 children with SSPE who were treated at German hospitals were identified. The capture-recapture estimate was 39 cases (95\% confidence interval: 29.2-48.0). The risk of developing SSPE for children contracting measles infection below 5 years of age was calculated as 1∶1700 to 1∶3300. This risk is in the same order of magnitude as the risk of a fatal acute measles infection.},
  language  = {en}
}
@article{WallmannSperlichFroboese2014,
  author    = {Wallmann-Sperlich, Birgit and Froboese, Ingo},
  title     = {Physical Activity during Work, Transport and Leisure in Germany - Prevalence and Socio-Demographic Correlates},
  doi       = {10.1371/journal.pone.0112333},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-113648},
  year      = {2014},
  abstract  = {Background This study aimed 1) to provide data estimates concerning overall moderate- and vigorous-intensity physical activity (MVPA) as well as MVPA during work, transport and leisure in Germany and 2) to investigate MVPA and possible associations with socio-demographic correlates. Methods A cross-sectional telephone survey interviewed 2248 representative participants in the age of 18-65 years (1077 men; 42.4±13.4 years; body mass index: 25.3±4.5kg•m-2) regarding their self-reported physical activity across Germany. The Global Physical Activity Questionnaire was applied to investigate MVPA during work, transport and leisure and questions were answered concerning their demographics. MVPA was stratified by gender, age, body mass index, residential setting, educational and income level. To identify socio-demographic correlates of overall MVPA as well as in the domains, we used a series of linear regressions. Results 52.8\% of the sample achieved physical activity recommendations (53.7\% men/52.1\% women). Overall MVPA was highest in the age group 18-29 years (p<.05), in participants with 10 years of education (p<.05) and in participants with lowest income levels <1.500€ (p<.05). Regression analyses revealed that age, education and income were negatively associated with overall and work MVPA. Residential setting and education was positively correlated with transport MVPA, whereas income level was negatively associated with transport MVPA. Education was the only correlate for leisure MVPA with a positive association. Conclusions The present data underlines the importance of a comprehensive view on physical activity engagement according to the different physical activity domains and discloses a need for future physical activity interventions that consider socio-demographic variables, residential setting as well as the physical activity domain in Germany.},
  language  = {en}
}