Results 111 to 120 of about 17,370,281 (337)
Molecular Oncology, EarlyView.This study identifies ARHGAP5, in addition to the frequently mutated ARHGAP35, as significantly mutated in endometrial cancer. Mutations in both genes co‐occur and are associated with their correlated downregulation. Functional CRISPR studies show that both paralogs regulate similar pathways, including actin cytoskeleton organization.
Mathilde Pinault +12 more
wiley +1 more source
A Comparison of Item Parameters across Item Types [PDF]
, 2014 Seven item formats from a professional licensure examination program (n=4,706) were evaluated to determine whether there are significant differences in item parameter estimates based on item formats.
Applegate, Gregory M.
core +1 more source
SAGE OpenIn order to investigate the influence of separation of grade distributions and ratio of common items on the precision of vertical scaling, this simulation study chooses common item design and first grade as base grade.
Guangming Li, Zhengyan Liang
doaj +1 more source
Frontiers in Psychology, 2014 During language comprehension, semantic contextual information is used to generate expectations about upcoming items. This has been commonly studied through the N400 event-related potential (ERP), as a measure of facilitated lexical retrieval.
Irene Fernández Monsalve +3 more
doaj +1 more source
An Experimental Design to Investigate Item Parameter Drift
Applied Psychological MeasurementMethods for detecting item parameter drift may be inadequate when every exposed item is at risk for drift. To address this scenario, a strategy for detecting item parameter drift is proposed that uses only unexposed items deployed in a stratified random method within an experimental design. The proposed method is illustrated by investigating unexpected
Peter Baldwin +5 more
openaire +3 more sources
Statistical Bias in Maximum Likelihood Estimators of Item Parameters [PDF]
Psychometrika, 1982 Asymptotic formulas are derived for the bias in the maximum likelihood estimators of the item parameters in the logistic item response model when examinee abilities are known. Numerical results are given for a typical verbal test for college admission.
openaire +1 more source
Molecular Oncology, EarlyView.Incomplete microwave ablation (iMWA) of liver cancer triggers a biphasic progression in residual tumors. At Day 3, the microenvironment is characterized by acute inflammatory responses and extracellular matrix (ECM) remodeling. By Day 14, a profound shift occurs toward oncogenic signal transduction and immunosuppression, marked by macrophage ...
Yu Liu +9 more
wiley +1 more source
Psychometrics With R: A Review Of CRAN Packages For Item Response Theory [PDF]
, 2013 In this paper we review the current state of R packages for Item Response Theory (IRT). We group the available packages based on their purpose and provide an overview of each package's main functionality.
Mair, Patrick +2 more
core
Bias and Linking Error in Fixed Item Parameter Calibration
AppliedMathThe two-parameter logistic (2PL) item response theory (IRT) model is frequently applied to analyze group differences for multivariate binary random variables.
Alexander Robitzsch
doaj +1 more source
Molecular Oncology, EarlyView.Circulating microRNA profiles distinguish nonmalignant Lynch syndrome from cancer‐associated Lynch syndrome, sporadic colorectal cancer, and healthy controls. Age‐stratified analysis reveals disease‐specific regulatory states, and a six‐miRNA panel shows concordant separation in an independent colorectal tissue cohort.
Ramadhani Salum Chambuso +5 more
wiley +1 more source