Search results for "comparison"

Importance sampling for Lambda-coalescents in the infinitely many sites model

2011

We present and discuss new importance sampling schemes for the approximate computation of the sample probability of observed genetic types in the infinitely many sites model from population genetics. More specifically, we extend the 'classical framework', where genealogies are assumed to be governed by Kingman's coalescent, to the more general class of Lambda-coalescents and develop further Hobolth et. al.'s (2008) idea of deriving importance sampling schemes based on 'compressed genetrees'. The resulting schemes extend earlier work by Griffiths and Tavar\'e (1994), Stephens and Donnelly (2000), Birkner and Blath (2008) and Hobolth et. al. (2008). We conclude with a performance comparison o…

VIII: Statistik in klinischen Publikationen: Checklisten für Autoren

2003

The "Material and Methods" section of clinical research papers should reference major aspects concerning statistical planning and evaluation of the study design and the resulting clinical data. Particular focus is laid on the listing of methods for description and significance evaluation of the trial data, as well as on design-associated study determinants (randomisation and masking strategy, response rate evaluation, primary endpoints, power and sample size determination, multiple testing, software and methods for statistical analysis). Suggestions for the minimum content to be mentioned in a trial publication are listed in author check lists and are illustrated by means of the study synop…

Older adult psychopathology: international comparisons of self-reports, collateral reports, and cross-informant agreement

2020

ABSTRACTObjectives:To conduct international comparisons of self-reports, collateral reports, and cross-informant agreement regarding older adult psychopathology.Participants:We compared self-ratings of problems (e.g. I cry a lot) and personal strengths (e.g. I like to help others) for 10,686 adults aged 60–102 years from 19 societies and collateral ratings for 7,065 of these adults from 12 societies.Measurements:Data were obtained via the Older Adult Self-Report (OASR) and the Older Adult Behavior Checklist (OABCL; Achenbach et al., 2004).Results:Cronbach’s alphas were .76 (OASR) and .80 (OABCL) averaged across societies. Across societies, 27 of the 30 problem items with the highest mean ra…

Comparing the relative volume with a revolution manifold as a model

1993

Given a pair (P, M), whereM is ann-dimensional connected compact Riemannian manifold andP is a connected compact hypersurface ofM, the relative volume of (P, M) is the quotient volume(P)/volume(M). In this paper we give a comparison theorem for the relative volume of such a pair, with some bounds on the Ricci curvature ofM and the mean curvature ofP, with respect to that of a model pair\(\left( {\mathcal{P},\mathcal{M}} \right)\) where ℳ is a revolution manifold and\(\mathcal{P}\) a “parallel” of ℳ.

Finite groups which are products of pairwise totally permutable subgroups

1998

Finite groups which are products of pairwise totally permutable subgroups are studied in this paper. The -residual, -projectors and -normalizers in such groups are obtained from the corresponding subgroups of the factor subgroups under suitable hypotheses.

Les systèmes éducatifs engendrent-ils des inégalités de bien-être ? : une recherche comparative internationale

2018

This study investigates the association between post-secondary education and well-being in international comparative perspective, conceptualizing well-being as a capability-informed measure of flourishing. Based on a combined human capital–capability approach, post-secondary education, operationalized as highest post-secondary educational credential, is hypothesized to relate positively with well-being net of individual-level and country-level controls at both the micro and macro levels of analysis. Prominent critiques of these approaches, suggesting indirect effects through occupational sorting at the individual level and economic factors at the country level, are also explored.Beyond thes…

Qualité et efficience de l'école primaire française : éléments de comparaisons spatiales et temporelles

2008

08001 - 20 p.; Document de travail de l'IREDU 2008-01; L'objectif principal de ce texte est de présenter des éléments factuels sur les résultats de l'école primaire française. Notre réflexion portera sur deux dimensions complémentaires, à savoir la qualité et l'efficience, celles-ci seront examinées dans une double perspective comparative (temporelle et spatiale). Dans une première partie, nous mobiliserons les données des enquêtes internationales pour apprécier les résultats des élèves français et leur évolution dans le temps sur ces 15 dernières années. La seconde partie sera consacrée aux coûts de l'enseignement primaire et plusieurs aspects seront abordés. Dans un premier temps, l'évolu…

Étude exploratoire des obstacles à la transition universitaire selon le vécu d’étudiants français et belges

2020

International audience; Transition to Higher Education constitutes a challenging adjustment step for students that deserves major investigation. Yet, the transition obstacles are still overlooked. Most of international studies focused on individual predictors of adjustment and consider transition to Higher Education as a universal and invariant process. However, contextual characteristics of educational environment should be considered because they don’t imply the same requirements for adjustment. In order to address this limitation, this paper realized an exploratory comparison of first year student experience between a French and a Belgian university. The results highlighted similarities …

Note critique : A World of Difference ? Comparing Learners Across Europe ? OSBORN M . ; BROADFOOT P . ; MC NESS E . ; PLANEL C . ; RAVN B . & TRIGGS …

2005

Parenting Stress in Families of Children with Autism Spectrum Disorder and ADHD

2015

The purpose of this study was to compare the parenting stress experienced by parents of 121 children from 5 to 9 years old with autism spectrum disorder (ASD), attention deficit/hyperactivity disorder (ADHD), comorbid ASD+ADHD, and typical development in different domains related to child and parent characteristics using the Parenting Stress Index. The three clinical groups presented greater perceived parenting stress than did the comparison group (CG). The ADHD group obtained higher levels of parenting stress related to attachment and depression than did the other groups. The ASD+ADHD group presented a unique profile of differences from the CG on Health and Spouse subscales. Results highl…