Results 41 to 50 of about 8,930,794 (288)

Pairwise Likelihood Estimation of the 2PL Model with Locally Dependent Item Responses

Applied Sciences
The local independence assumption is crucial for the consistent estimation of item parameters in item response theory models. This article explores a pairwise likelihood estimation approach for the two-parameter logistic (2PL) model that treats the local
Alexander Robitzsch
doaj   +1 more source

Feature Selection based on the Local Lift Dependence Scale

Entropy, 2018
This paper uses a classical approach to feature selection: minimization of a cost function applied on estimated joint distributions. However, in this new formulation, the optimization search space is extended.
Diego Marcondes, Adilson Simonis, Junior Barrera   +2 more
doaj   +1 more source

Local item dependence on the vocabulary levels test revisited

Vocabulary Learning and Instruction, 2014
The purpose of this study was to address the question of local item dependence (LID) on the Vocabulary Levels Test (VLT). The test format adopts a matching format consisting of six words and three definitions.
Tadamitsu Kamimoto
doaj   +1 more source

Detecting the influence of item chaining on student responses to the Force Concept Inventory and the Force and Motion Conceptual Evaluation

Physical Review Physics Education Research, 2020
Items that are chained, or blocked, together appear on many of the conceptual assessments utilized for physics education research. However, when items are chained together there is the potential to introduce local dependence between those items, which ...
Philip Eaton, Barrett Frank, Shannon Willoughby   +2 more
doaj   +1 more source

Environmental Dependence of Local Luminous Infrared Galaxies

, 2010
We study the environmental dependence of local luminous infrared galaxies (LIRGs) and ultraluminous infrared galaxies (ULIRGs) found in the Sloan Digital Sky Survey (SDSS) data.
Abazajian, Allam, Baldwin, Balogh, Bitsakis, Blanton, Blanton, Brinchmann, Bruzual, C. Park, Capak, Cardelli, Carlberg, Chary, Chen, Choi, Colless, Cooper, D. Elbaz, Dasyra, Elbaz, Falco, Farrah, Feruglio, Gallazzi, Genzel, Gilli, Goto, Gómez, H. M. Lee, H. S. Hwang, Hill, Hill, Hopkins, Hwang, Hwang, Hwang, Ideue, J. C. Lee, Jeong, Kauffmann, Kauffmann, Kennicutt, Kennicutt, Kewley, Kewley, Kim, Koulouridis, Le Floc’h, Le Floc’h, Lee, Lewis, Li, Lotz, M. G. Lee, Magnelli, Marcillac, Murakami, Murphy, Neugebauer, Noeske, Noeske, Owers, Park, Park, Park, Park, Park, Patel, Sanders, Shi, Shi, Slinglend, Soifer, Stoughton, Sutherland, Tanaka, Tran, Tremonti, Veilleux, Veilleux, Veilleux, W.-S. Jeong, Wang, Wang, Wang, Wegner, Wegner, York, Yuan, Zauderer   +90 more
core   +1 more source

Attribute Reduction Method of Covering Rough Set Based on Dependence Degree

International Journal of Computational Intelligence Systems, 2021
Attribute reduction is a hot topic in the field of data mining. Compared with the traditional methods, the attribute reduction algorithm based on covering rough set is more suitable for dealing with numerical data.
Li Fachao, Ren Yexing, Jin Chenxia
doaj   +1 more source

A Comparison of Limited Information Estimation Methods for the Two-Parameter Normal-Ogive Model with Locally Dependent Items

Stats
The two-parameter normal-ogive (2PNO) model is one of the most popular item response theory (IRT) models for analyzing dichotomous items. Consistent parameter estimation of the 2PNO model using marginal maximum likelihood estimation relies on the local ...
Alexander Robitzsch
doaj   +1 more source

Energy dependence of non-local potentials

, 2017
Recently a variety of studies have shown the importance of including non-locality in the description of reactions. The goal of this work is to revisit the phenomenological approach to determining non-local optical potentials from elastic scattering.
Bacq, P. -L., Capel, P., Lovell, A. E., Nunes, F. M., Titus, L. J.   +4 more
core   +1 more source

Scale-dependent non-Gaussianity probes inflationary physics

, 2010
We calculate the scale dependence of the bispectrum and trispectrum in (quasi) local models of non-Gaussian primordial density perturbations, and characterize this scale dependence in terms of new observable parameters.
A. Chambers, A.A. Starobinsky, A.A. Starobinsky, A.D. Linde, A.P.S. Yadav, C.T Byrnes, C.T. Byrnes, C.T. Byrnes, C.T. Byrnes, C.T. Byrnes, C.T. Byrnes, C.T. Byrnes, D Wands, D. Battefeld, D. Langlois, D. Langlois, D. Seery, D. Seery, D. Wands, D.E. Holz, D.H. Lyth, D.H. Lyth, E. Komatsu, E. Komatsu ., E. Sefusatti, F. Bernardeau, F. Vernizzi, G Tasinato, J. Khoury, J. Kumar, J. Smidt ., J.M. Maldacena, J.R. Fergusson, K. Enqvist, K. Enqvist, K. Enqvist, K. Enqvist, K. Kohri, K.-Y. Choi, K.-Y. Choi, K.A. Malik, L. Cayon, L. Kofman, M Gerstenlauer, M. Baldi, M. LoVerde, N. Barnaby, N. Bartolo, P. Chingangbam, P. Chingangbam, P. Vielva, Q.-G. Huang, S Nurmi, S. Chongchitnan, S. Renaux-Petel, S. Yokoyama, T. Battefeld, V. Desjacques   +57 more
core   +1 more source

Hartree-Fock theory of a current-carrying electron gas [PDF]

, 2006
State-of-the-art simulation tools for nonequilibrium quantum transport systems typically take the current-carrier occupations to be described in terms of equilibrium distribution functions characterized by two different electrochemical potentials, while ...
H. Haug, H. Mera, P. Bokes, R. W. Godby, S. Datta, T. N. Todorov   +5 more
core   +2 more sources