Results 41 to 50 of about 485,678 (204)

Multipole polarizability of a graded spherical particle [PDF]

open access: yes, 2005
We have studied the multipole polarizability of a graded spherical particle in a nonuniform electric field, in which the conductivity can vary radially inside the particle.
Dong, L.   +3 more
core   +2 more sources

Evaluation of Buss-Perry aggression Questionnaire with item response theory (IRT) [PDF]

open access: yesPsihologija, 2012
The aim of this research was to examine the psychometric properties of the Buss-Perry Aggression Questionnaire on Serbian sample, using the IRT model for graded responses.
Dinić Bojana, Janičić Bojan
doaj   +1 more source

Investigating Item Parameter Estimation Accuracy in Multidimensional Polytomous Data Under Various Conditions

open access: yesHayef: Journal of Education, 2023
In this study, the root mean square error values of item parameters’ estimation in a two-dimensional structure condition were examined under different conditions, considering three and five categories with different algorithms (Expectation–Maximization ...
Serap BÜYÜKKIDIK, Hakan Yavuz ATAR
doaj  

Differential item functioning in the Patient Reported Outcomes Measurement Information System Pediatric Short Forms in a sample of children and adolescents with cerebral palsy. [PDF]

open access: yes, 2016
AIM: The present study examined the Patient Reported Outcomes Measurement Information System (PROMIS) Mobility, Fatigue, and Pain Interference Short Forms (SFs) in children and adolescents with cerebral palsy (CP) for the presence of differential item ...
Bjorner   +17 more
core   +2 more sources

Assessment of health surveys: fitting a multidimensional graded response model [PDF]

open access: yesPsychology, Health & Medicine, 2018
The multidimensional graded response model, an item response theory (IRT) model, can be used to improve the assessment of surveys, even when sample sizes are restricted. Typically, health-based survey development utilizes classical statistical techniques (e.g. reliability and factor analysis).
Sarah Depaoli   +2 more
openaire   +2 more sources

Assessing Cognitive and Social Attitudes toward Environmental Conservation in Coral Reef Social-Ecological Systems

open access: yesSocial Sciences, 2018
This study addresses the latent construct of attitudes toward environmental conservation based on study participant’s responses. We measured and evaluated the latent scale based on an 18-item scale instrument, over four experimental strata (N = 945)
Kostas Alexandridis
doaj   +1 more source

Cell-to-cell variability in JAK2/STAT5 pathway components and cytoplasmic volumes defines survival threshold in erythroid progenitor cells

open access: yesCell Reports, 2021
Summary: Survival or apoptosis is a binary decision in individual cells. However, at the cell-population level, a graded increase in survival of colony-forming unit-erythroid (CFU-E) cells is observed upon stimulation with erythropoietin (Epo).
Lorenz Adlung   +10 more
doaj   +1 more source

Equating Tests Under the Graded Response Model [PDF]

open access: yesApplied Psychological Measurement, 1992
The Stocking and Lord (1983) procedure for computing equating coefficients for tests having dichotomously scored items is extended to the case of graded response items. A system of equations for obtaining the equating coefficients under Samejima's (1969, 1972) graded response model is derived.
openaire   +2 more sources

Quasi-Static compressive responses and fatigue behaviour of Ti-6Al-4 V graded lattice structures fabricated by laser powder bed fusion

open access: yesMaterials & Design, 2021
Graded lattice structures have been paid wide attention in the engineering and biological fields due to their excellent energy absorption capacity and variable porosity characteristics.
Long Bai   +9 more
doaj   +1 more source

Carcinomas and Carcinoid Tumors of the Lungs and Bronchi in Children and Adolescents: The EXPeRT Recommendations

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Primary lung carcinomas and bronchial carcinoid tumors (BC) are very rare malignancies in childhood. While typical BC and mucoepidermoid carcinomas are mostly low‐grade, localized tumors with a more favorable prognosis than in adults, necessitating avoidance of overtreatment, adenocarcinomas of the lung are often diagnosed at advanced disease ...
Michael Abele   +19 more
wiley   +1 more source

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