Results 161 to 170 of about 77,313 (266)

Testing for Bivariate Spherical Symmetry

An omnibus test for spherical symmetry in R2 is proposed, employing localized empirical likelihood. The thus obtained test statistic is distri- bution-free under the null hypothesis. The asymptotic null distribution is established and critical values for
Gantner, M., Einmahl, J.H.J.
core  

Estimating the reliability of round‐robin judgments with social relations confirmatory factor analyses

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract The social relations model (SRM) is commonly used in psychological research to analyse interdependent data from round‐robin designs, where all members of a group rate each other. Based on the recently suggested social relations confirmatory factor analysis (SR‐CFA), we present general formulas for determining the reliability of composites of ...
Steffen Nestler, Oliver Lüdtke, Alexander Robitzsch   +2 more
wiley   +1 more source

Anemia in HIV-Infected Children on ART in Uganda: High Risk Associations with Malaria, Opportunistic Infections, and Poor Adherence. [PDF]

HIV AIDS (Auckl)
Anyelwisye CL, Ogwal JK, Kadogosa SE, Timuzigu R, Anyetaba C, Wagubi R, Olong C, John EA, Muwanguzi E, Okongo B.   +9 more
europepmc   +1 more source

To vary or not to vary: A flexible empirical Bayes factor for testing variance components

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract Random effects are the gold standard for capturing structural heterogeneity, such as individual differences or temporal dependence. Yet testing their presence is difficult because variance components are constrained to be non‐negative, creating a boundary problem. This paper introduces a flexible empirical Bayes factor (EBF) for testing random
Fabio Vieira, Hongwei Zhao, Joris Mulder
wiley   +1 more source

The cost of caring: understanding occupational stress among nurses at Mulago National Referral Hospital. [PDF]

Front Public Health
Tumusiime E, Atuhaire E, Namanya E, Muhwezi A, Mudenda S, Ouma Omolo R, Mugenyi N.   +6 more
europepmc   +1 more source

Dynamic stochastic copula models: Estimation, inference and applications

We propose a new dynamic copula model where the parameter characterizing dependence follows an autoregressive process. As this model class includes the Gaussian copula with stochastic correlation process, it can be viewed as a generalization of ...
Hafner, Christian M., Manner, Hans
core  

Approximating multidimensionality with asymmetric unidimensional IRT models

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract Unidimensional item response theory (IRT) models are widely used even in settings where assessment data exhibit subtle forms of multidimensionality. Recent empirical evidence suggests that when item difficulty is associated with dimensionality, asymmetric item characteristic curves (ICCs) emerge in the unidimensional approximation.
Xiangyi Liao, Yinqiu He, Daniel Bolt, James Soland, Carlin Conner, Emily J. Solari   +5 more
wiley   +1 more source

Case-control study determining risk factors for dengue fever among patients attending selected hospitals in Mogadishu, Somalia. [PDF]

BMC Infect Dis
Ahmed HA, Isahaq Aweis DM, Mohamed SYS, Shil GD.   +3 more
europepmc   +1 more source

Proteomic profile of CSF obtained at the time of diagnosis determines amyotrophic lateral sclerosis progression and survival: CXCL7 levels in disease prognosis and survival

Brain Pathology, EarlyView.
Untargeted multiomic profiling of cerebrospinal fluid reveals that proteomic, but not lipidomic, signatures robustly distinguish ALS patients from controls and stratify individuals by survival, highlighting marked molecular differences between short survival and long survival disease.
Sergio Roca‐Pereira, Yaiza López‐Sampere, Pol Mengod‐Soler, Mario Peña‐Fonteboa, Carla Marco, Alejandro Caravaca‐Puchades, Raúl Domínguez, Juan Francisco Vázquez‐Costa, Enrique Santamaría, Joaquín Fernández‐Irigoyen, María J. Colomina, Isabel León Moreno, Antonio Martínez Yélamos, Sergio Martínez Yélamos, Gabriel Santpere, Elia Obis, Manuel Portero‐Otín, Gerard Piñol‐Ripoll, Mónica Povedano, Pol Andrés‐Benito   +19 more
wiley   +1 more source

Postoperative outcomes of bariatric surgery performed by trainees: a retrospective single-centre study from a Swiss regional hospital. [PDF]

Langenbecks Arch Surg
Soll C, Arbogast M, Sarach J, Biraima M.
europepmc   +1 more source