Results 131 to 140 of about 4,433,555 (304)
DIF Trees: Using Classification Trees to Detect Differential Item Functioning
, 2010 A nonparametric tree classification procedure is used to detect differential item functioning for items that are dichotomously scored. Classification trees are shown to be an alternative procedure to detect differential item functioning other than the ...
Brandon K. Vaughn, Qiu Wang
core +1 more source
‘Guide and Prejudice’— How Argonautes recognize targets across domains of life
FEBS Letters, EarlyView.Argonaute proteins use short nucleic‐acid guides to locate and regulate specific targets across all domains of life. Despite striking diversity—from human gene silencing to bacterial immune defence—all Argonautes share a conserved three‐stage recognition logic: guide‐directed sampling, progressive target pairing with a conformational checkpoint and ...
Jack P. K. Bravo
wiley +1 more source
Avaliação de desempenho logístico no serviço ao cliente baseada na teoria da resposta ao item [PDF]
, 2012 Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia de Produção, Florianópolis, 2011A busca por alternativas para avaliar o desempenho logístico foi o que instigou esta pesquisa.
Vey, Ivan Henrique
core
Investigation of Equating Error in Tests with Differential Item Functioning
International Journal of Assessment Tools in Education, 2017 In this study purposes to indicate the effect of the number of DIF items and the distribution of DIF items in these forms, which be equalized on equating error.
Meltem Yurtçu, Cem Oktay Güzeller
doaj
Structural and biochemical analysis of a B12 superbinder
FEBS Letters, EarlyView.BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices +3 more
wiley +1 more source
Extending the Cluster Approach to Differential Item Functioning in Polytomous Items
Journal of Educational and Behavioral StatisticsTo objectively compare groups on any latent trait using tests, the absence of differential item functioning (DIF) is crucial. While the importance of DIF has been well-established in research, the question of how to identify DIF-free items is still largely open.
Schoenmakers, Martijn +3 more
openaire +2 more sources
FEBS Letters, EarlyView.Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav +2 more
wiley +1 more source
Using machine learning to identify causes of differential item functioning
Assessment programs frequently assess for evidence of differential item functioning in order to support the fairness and equity of assessments; however, attempting to understand why differential item functioning is occurring is much less prevalent.
Jeffrey C. Hoover
core +1 more source
Differential item functioning by gender for Item 46 (Staff are helpful, kind and polite).
, 2016 Differential item functioning by gender for Item 46 (Staff are helpful, kind and polite).
Patrick Callaghan (2558638) +4 more
core +1 more source
FEBS Letters, EarlyView.How do genomes gain new functional parts? In eukaryotes, which tend to evolve under weak selection, much of the genome is junk. Palazzo and Qiu borrow the logic of Markov chains to show how non‐functional DNA becomes functional through the appearance of intermediate states, which arise due to epistasis, buffering, and biochemical messiness, allowing ...
Alexander F. Palazzo, Yi Qiu
wiley +1 more source