Results 141 to 150 of about 1,625,624 (298)
SIMEX-Based and Analytical Bias Corrections in Stocking–Lord Linking
AnalyticsStocking–Lord (SL) linking is a popular linking method for group comparisons based on dichotomous item responses. This article proposes a bias correction technique based on the simulation extrapolation (SIMEX) method for SL linking in the 2PL model in ...
Alexander Robitzsch
doaj +1 more source
Approximating Bifactor IRT True-Score Equating With a Projective Item Response Model. [PDF]
Appl Psychol Meas, 2020 Kim KY, Cho UH.
europepmc +1 more source
ltm: An R Package for Latent Variable Modeling and Item Response Analysis [PDF]
The R package ltm has been developed for the analysis of multivariate dichotomous and polytomous data using latent variable models, under the Item Response Theory approach.
Dimitris Rizopoulos
core +1 more source
Molecular Oncology, EarlyView.Monitoring circulating tumor DNA (ctDNA) in patients with operable breast cancer can reveal disease relapse earlier than radiology in a subset of patients. The failure to detect ctDNA in some patients with recurrent disease suggests that ctDNA could serve as a supplement to other monitoring approaches.
Kristin Løge Aanestad +35 more
wiley +1 more source
A Multiprocess Item Response Model for Not-Reached Items due to Time Limits and Quitting. [PDF]
Educ Psychol Meas, 2020 Ulitzsch E, von Davier M, Pohl S.
europepmc +1 more source
Estimating and explaining differences in income related inequality in health across general practices. [PDF]
We use data on individual patients in general practices to examine whether income related inequality in self reported health differs across general practices and whether such differences are explained by characteristics of the practices. We allow for the
Hugh Gravelle +2 more
core
Modeling Item-Level Data With Item Response Theory
Current Directions in Psychological Science, 1998 ficult questions. Ideally, the two camps should have much cross fertilization, and the lines between them should be blurred. However, complex theories are often con structed before appropriate meth ods are developed for testing the hypotheses. Additionally, quanti tative psychologists often develop techniques that might be difficult and impractical to ...
openaire +3 more sources
Molecular Oncology, EarlyView.The LINC01116 long noncoding RNA is induced by hypoxia and associated with poor prognosis and high recurrence rates in two cohorts of lung adenocarcinoma patients. Here, we demonstrate that besides its expression in cancer cells, LINC01116 is markedly expressed in lymphatic endothelial cells of the tumor stroma in which it participates in hypoxia ...
Marine Gautier‐Isola +12 more
wiley +1 more source
Sequential Regression Multiple Imputation for Incomplete Multivariate Data using Markov Chain Monte Carlo [PDF]
This paper discusses the theoretical background to handling missing data in a multivariate context. Earlier methods for dealing with item non-response are reviewed, followed by an examination of some of the more modern methods and, in particular ...
Cally Ardington +2 more
core +1 more source
ATF4‐mediated stress response as a therapeutic vulnerability in chordoma
Molecular Oncology, EarlyView.We screened 5 chordoma cell lines against 100+ inhibitors of epigenetic and metabolic pathways and kinases and identified halofuginone, a tRNA synthetase inhibitor. Mechanistically halofuginone induces an integrated stress response, with eIF2alpha phosphorylation, activation of ATF4 and its target genes CHOP, ASNS, INHBE leading to cell death ...
Lucia Cottone +11 more
wiley +1 more source