Results 171 to 180 of about 4,727,875 (282)

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

Multidimensional unipolar IRT and applications to the measurement of print exposure

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract Item response theory (IRT) has been a prominent modelling framework in educational and psychological measurement. Traditional IRT models are bipolar, commonly assuming symmetric measurement link functions and symmetric trait distributions over a latent continuum unbounded at both ends. However, many measured constructs, such as print exposure,
Qi (Helen) Huang, Daniel M. Bolt
wiley   +1 more source

Whole-transcriptome dynamics reveal distinct regulatory networks during sugar beet vernalization. [PDF]

Front Plant Sci
Zhou X, Zhong Z, Wang L, Ku Y, Wu Z, Pi Z.   +5 more
europepmc   +1 more source

On the asymmetry, complexity and predicted data patterns of nontraditional item response theory models

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract Traditional item response theory (IRT) models involve symmetric response probability functions, but a developing area of research has focused on asymmetric alternatives. To date, these studies have focused primarily on introducing new asymmetric models, detailing their mathematical formulations, explaining how to interpret their item ...
Hyejin Shim, Wes Bonifay
wiley   +1 more source

Matching circadian rhythms to light-dark cycles increases lettuce yield by 29% in vertical farms without additional energy input. [PDF]

J Exp Bot
Anton-Sales C, Benckhuysen L, Peker B, Jeuken M, Bonnema G.   +4 more
europepmc   +1 more source

A regularised latent‐class item response model for detecting measurement non‐invariance in ordinal response scales

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract Measurement non‐invariance arises when the psychometric properties of a scale differ across subgroups, undermining the validity of group comparisons. At the item level, this manifests as differential item functioning (DIF), where item responses differ across groups after controlling for the latent trait.
Gabriel Wallin, Qi Huang
wiley   +1 more source

Lower Bolting Height of Winter Rapeseed (<i>Brassica napus</i> L.) Enhances Cold Stress Tolerance and Adaptability to Arid-Frigid Regions in Northern China. [PDF]

Plants (Basel)
Liang Z, Chen S, Fan T, Yang W, Sang J, Wu J, Ma L, Pu Y, Wang W, Liu L, Liu H, Yang G, Sun W.   +12 more
europepmc   +1 more source

α‐Synuclein strain homogeneity in multiple system atrophy subtypes

Brain Pathology, EarlyView.
Two different subtypes of multiple system atrophy are recognized: MSA‐C and MSA‐P. In this manuscript, Lau et al. investigate whether MSA‐C and MSA‐P are caused by different strains of α‐synuclein aggregates. By performing conformational fingerprinting experiments as well as in vitro and in vivo seeding assays, their findings suggest that both MSA‐C ...
Heather H. C. Lau, Nicholas R. G. Silver, Surabhi Mehra, Raphaella W. L. So, Le yao Li, Alison Mao, Erica Stuart, Cian Schmitt‐Ulms, Bradley T. Hyman, Martin Ingelsson, Joel C. Watts   +10 more
wiley   +1 more source

Genome-wide association study and genomic prediction of bolting trait in spinach (<i>Spinacia oleracea</i> L.). [PDF]

Front Plant Sci
Alkabkabi H, Chiwina K, Qu Y, Du R, Khanal R, Luo Q, Ullah MM, Xiong H, Rosas-Anderson P, Mou B, Shi A.   +10 more
europepmc   +1 more source

Deindustrialization and demographic change: Evidence from big plant closures and downsizing

Canadian Journal of Economics/Revue canadienne d'économique, EarlyView.
Abstract We estimate the causal effect of big manufacturing plant closures and downsizing on the socioeconomic composition of Canadian cities between 2001 and 2021. Our instrumental variables estimates show that big manufacturing plant closures and downsizing—large local labour demand shocks—lead to less population growth and a shift in the demographic
Kristian Behrens, Florian Mayneris, Manassé Drabo   +2 more
wiley   +1 more source