An application of item response theory to psychological test development
Psicologia: Reflexão e Crítica, 2016 Item response theory (IRT) has become a popular methodological framework for modeling response data from assessments in education and health; however, its use is not widespread among psychologists. This paper aims to provide a didactic application of IRT
Cristian Zanon +3 more
doaj +1 more source
Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system
FEBS Letters, EarlyView.Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley +1 more source
Marginal Maximum Likelihood Estimation of Item Response Models in R [PDF]
Item response theory (IRT) models are a class of statistical models used by researchers to describe the response behaviors of individuals to a set of categorically scored items.
Matthew S. Johnson
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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
The human gut microbiome across the life course
FEBS Letters, EarlyView.Despite significant individual variation and continuous change throughout life, the human gut microbiome follows some life stage‐specific trends. This article provides a brief overview of how gut microbiome composition shifts across different phases of life. Created in BioRender. Özkurt, E. (2026) https://BioRender.com/8q4nrnc.
Alise J. Ponsero +4 more
wiley +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
FEBS Letters, EarlyView.We present robust protocols for the preparation of supported lipid bilayers (SLBs) incorporating either Salmonella smooth LPS or outer membrane vesicles (OMVs). We use a combination of quartz crystal microbalance with dissipation (QCM‐D) and fluorescence microscopy to both characterize the SLBs of various compositions and to probe their interactions ...
Hudson P. Pace +6 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 Item Response Theory Approach to the Maintenance of Standards in Public Examinations in England [PDF]
, 2011 Every year outcomes from public examinations in the UK rise: politicians congratulate pupils on their hard earned achievement; the media questions whether this achievement is real; those responsible for administrating the examinations defend their ...
WHEADON, CHRISTOPHER,BRIAN +1 more
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