Search results for " Measurement theory"

showing 3 items of 3 documents

Cross-country comparisons of trends in adolescent psychosomatic symptoms : a Rasch analysis of HBSC data from four Nordic countries

2018

BACKGROUND: To analyse the psychometric properties of the HBSC Symptom Checklist (HBSC-SCL) on psychosomatic symptoms with a focus on the operating characteristics of the items, and on the impacts of measurement distortions on the comparisons of person measures across time and between countries.METHODS: Data were collected in 1993/94, 1997/98, 2001/02, 2005/06, 2008/09, 2013/14 in Denmark, Finland, Norway and Sweden as part of the Health Behaviour in School-aged Children (HBSC) study. Data comprised 116,531 students 11, 13 and 15 years old. Rasch analysis was conducted of the HBSC-SCL consisting of eight items with a focus on Differential Item Functioning (DIF) and item threshold ordering. …

MaleAdolescentPsychometricsDenmarkScandinavian and Nordic CountriesAdolescentslcsh:Computer applications to medicine. Medical informaticsbehavioral disciplines and activitiesnuoretSurveys and QuestionnairesPsychosomatic symptomsTrend analysesdifferential item functioningHumansadolescentsSociologi (exklusive socialt arbete socialpsykologi och socialantropologi)ChildStudentsFinlandSwedenHBSCNorwayResearchSociology (excluding Social Work Social Psychology and Social Anthropology)Public Health Global Health Social Medicine and EpidemiologyHealth Status DisparitiesPsychophysiologic DisordersRasch measurement theorytrenditpsykometriikkaFolkhälsovetenskap global hälsa socialmedicin och epidemiologiAdolescent BehaviorpsykosomatiikkaQuality of Lifelcsh:R858-859.7FemaleSymptom AssessmentDifferential item functioningpsychosomatic symptomstrend analyses
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Interference Effects in Photodetachment of F- in a Strong Circularly Polarized Laser Pulse

2007

A numerical simulation of photodetachment of F{sup -} by a circularly polarized laser pulse has been accomplished by using a Keldysh-type approach. The numerical results are in agreement with measurements of photoelectron energy spectra recently reported in the literature. The features exhibited by the spectra are traced back to quantum interference effects, in the same spirit as in a double-slit experiment in the time doma0008.

PhysicsComputer simulationComputer simulation Laser pulses Measurement theory Numerical methods Time domain analysisNumerical analysisInterference (wave propagation)LaserAtomic and Molecular Physics and OpticsSpectral lineSettore FIS/03 - Fisica Della MateriaPulse (physics)law.inventionX-ray photoelectron spectroscopylawPhysics::Atomic PhysicsAtomic physicsEnergy (signal processing)
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Psychometric Properties of the Scoliosis Research Society Questionnaire (Version 22r) Domains Among Adults With Spinal Deformity : A Rasch Measuremen…

2022

Objective: Adults with degenerative spinal deformity (ASD) have lower health-related quality of life (HRQL) compared to the general population. Applying Rasch Measurement Theory (RMT), this study tested the revised Scoliosis Research Society-22 (SRS-22r) HRQL instrument among symptomatic adult patients with degenerative spinal disorders and varying degrees of ASD. Methods: SRS-22r data from 637 outpatient spine clinic patients with degenerative spine conditions were investigated for unidimensionality, item/scale fit, differential item functioning (DIF), scale coverage/targeting, and person separation index (PSI) using RMT. Results: Unidimensionality of the SRS-22r was not supported for eith…

skolioosispinal diseaseselämänlaatu3121 Internal medicine3126 Surgery anesthesiology intensive care radiologyoutcomes researchpsykometriikkaRaschin malliselkäsairaudetmittarit (mittaus)health related quality of lifeSurgerylatent trait theoryNeurology (clinical)SRS-22rrasch measurement theory
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