Results 111 to 120 of about 9,369 (262)

Complementarity based a posteriori error estimates and their properties

Mathematics and Computers in Simulation, 2012
The paper studies complementary approaches in a posteriori finite element error estimation for a diffusion-reaction model problem. These approaches provide sharp and guaranteed upper bonds for the energy norm of the error and they are independent from the way how the approximate solution is obtained. Numerical tests are also discussed.
openaire   +4 more sources

Calibrating Bayesian inference

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract Bayesian statistics has gained popularity in psychological research due to its intuitive uncertainty quantification and convenient information‐updating rules. In many applications, however, prior distributions are introduced merely as instruments to facilitate computation, rather than as representations of genuine subjective belief ...
Yang Liu, Jonathan P. Williams, Jan Hannig   +2 more
wiley   +1 more source

Review of cognitive diagnostic models (CDMs): Recent methodological advancements for addressing practical challenges

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract Cognitive diagnostic models (CDMs) have become essential tools for providing fine‐grained information about individuals' mastery of cognitive skills. While prior reviews have emphasized statistical foundations and deep learning‐based developments, this article focuses on recent methodological innovations designed to address persistent ...
Chun Wang, Yale Quan, David Arthur
wiley   +1 more source

Revisiting reliability and measurement precision: Towards a unified perspective

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract This article revisits the concepts of reliability and measurement precision across classical test theory (CTT), item response theory (IRT) and cognitive diagnosis models (CDMs), emphasizing their conceptual differences and proposing a unified framework.
Jimmy de la Torre, Klaas Sijtsma, Rodrigo Schames Kreitchmann   +2 more
wiley   +1 more source

On the asymmetry, complexity and predicted data patterns of nontraditional item response theory models

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract Traditional item response theory (IRT) models involve symmetric response probability functions, but a developing area of research has focused on asymmetric alternatives. To date, these studies have focused primarily on introducing new asymmetric models, detailing their mathematical formulations, explaining how to interpret their item ...
Hyejin Shim, Wes Bonifay
wiley   +1 more source

A regularised latent‐class item response model for detecting measurement non‐invariance in ordinal response scales

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract Measurement non‐invariance arises when the psychometric properties of a scale differ across subgroups, undermining the validity of group comparisons. At the item level, this manifests as differential item functioning (DIF), where item responses differ across groups after controlling for the latent trait.
Gabriel Wallin, Qi Huang
wiley   +1 more source

Computing Skinning Weights via Convex Duality

Computer Graphics Forum, EarlyView.
We present an alternate optimization method to compute bounded biharmonic skinning weights. Our method relies on a dual formulation, which can be optimized with a nonnegative linear least squares setup. Abstract We study the problem of optimising for skinning weights through the lens of convex duality.
J. Solomon, O. Stein
wiley   +1 more source

Neonatal Assessment Visual European Grid accuracy in detecting infants born preterm at risk of neurological impairment

Developmental Medicine &Child Neurology, EarlyView.
NAVEG: a screening tool for detecting preterm newborn at risk of neurolocal impairment, key findings and diagnostic accuracy. Abstract Aim To analyse the factorial structure of the Neonatal Assessment Visual European Grid (NAVEG), its diagnostic accuracy, the discriminative capacity of its individual items, and total score in detecting infants born ...
Elisa Fazzi, Laura Malerba, Jessica Galli, Salvatore Aversa, Lotfi B. Merabet, Francesco Risso, Andrea Rossi, NAVEG Group, Patrizia Accorsi, Anna Alessandrini, Sabina Bettelli, Nicole D'adda, Erika Loi, Michela Gritti, Paola Martelli, Paola Mattei, Giuseppe Nascimbeni, Federica Tansini, Francesco Semeraro, Vania Spinoni, Serena Micheletti, Giulia Balboni   +21 more
wiley   +1 more source

Computationally Efficient Ranking of Sampling Locations by Redundancy in Groundwater Monitoring Networks

Groundwater Monitoring &Remediation, EarlyView.
Abstract The long‐term and frequent sampling of groundwater monitoring networks is common practice for monitoring the concentrations of constituents of potential concern (CoPC) over space and time. Sampling can be a costly and time‐intensive process that also incurs health and safety risks. A redundancy‐based ranking of candidate sampling locations can
Peter Radvanyi, Claire Miller, Craig Alexander, Marnie Low, Luc Rock, Wayne Jones   +5 more
wiley   +1 more source

A-posteriori error estimators and RFB

, 2016
We derive a posteriori bounds for the residual-free bubble (RFB) method for the solution of convection-dominated diffusion equations. Both linear functional error control and energy norm error control are considered. The implementation of a reliable and efficient $h$ adaptive algorithm is discussed.
Cangiani, A, Suli, E
openaire   +1 more source