Results 91 to 100 of about 20,299,108 (307)
Item Response Theory for trait assessment in randomized item pool for computer based test
Scientific AfricanThe rapid adoption of computer-based examinations (CBE) has raised concerns regarding fairness and reliability in assessing student performance. This study examines randomized test item fairness to test takers’ traits in CBE through the application of ...
Rhydal Esi Eghan +5 more
doaj +1 more source
DFIT: An R Package for Raju's Differential Functioning of Items and Tests Framework
Journal of Statistical Software, 2017 This paper presents DFIT, an R package that implements the differential functioning of items and tests framework as well as the Monte Carlo item parameter replication approach for producing cut-off points for differential item functioning indices ...
Víctor H. Cervantes
doaj +1 more source
Exploration and analysis of a generalized one-parameter item response model with flexible link functions. [PDF]
Front Psychol, 2023 Wang X, Zhang J, Lu J, Cheng G, Shi N.
europepmc +1 more source
Design and analysis strategies for robust microbiome ageing research
FEBS Letters, EarlyView.The gut microbiome changes with age and associates with age‐related morbidity and mortality, establishing it as a potential biomarker and intervention target for ageing. Realising this potential requires methodological rigour, yet distinguishing biological signals from methodological artefacts remains challenging across cohorts. This review provides an
Mark Olenik +5 more
wiley +1 more source
BAYES MODAL ESTIMATION IN ITEM RESPONSE MODELS* [PDF]
ETS Research Report Series, 1985 ABSTRACTThis article describes a Bayesian framework for estimation in item response models, with two‐stage prior distributions on both item and examinee populations. Strategies for point and interval estimation are discussed, and a general procedure based on the EM algorithm is presented. Details are given for implementation under one‐, two‐, and three‐
openaire +2 more sources
FoundationsIn fixed item parameter calibration (FIPC), an item response theory (IRT) model is estimated with item parameters fixed at reference values to estimate the distribution parameters within a specific group.
Alexander Robitzsch
doaj +1 more source
The Dirichlet Dual Response Model: An Item Response Model for Continuous Bounded Interval Responses. [PDF]
Psychometrika, 2023 Kloft M, Hartmann R, Voss A, Heck DW.
europepmc +1 more source
Reconstructing enzyme evolution by protein engineering
FEBS Letters, EarlyView.Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler +2 more
wiley +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
An Evaluation of Overall Goodness-of-Fit Tests for the Rasch Model
Frontiers in Psychology, 2019 For assessing the fit of item response theory models, it has been suggested to apply overall goodness-of-fit tests as well as tests for individual items and item pairs.
Rudolf Debelak
doaj +1 more source