Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Alwin Stegeman"'
Publikováno v:
PLoS ONE, Vol 10, Iss 3, p e0120145 (2015)
People's Belief in a Just World (BJW) plays an important role in coping with misfortune and unfairness. This paper demonstrates that understanding of the BJW concept, and its consequences for behavior, is enhanced if we specify what (or who) the sour
Externí odkaz:
https://doaj.org/article/579fd2412e554ed48b8db8c676784eda
Publikováno v:
PLoS ONE, Vol 10, Iss 7, p e0132765 (2015)
Although heterogeneity of depression hinders research and clinical practice, attempts to reduce it with latent variable models have yielded inconsistent results, probably because these techniques cannot account for all interacting sources of heteroge
Externí odkaz:
https://doaj.org/article/e23e980c04b642eea70e412732adfdfd
Autor:
Bibiana Armenta Gutiérrez, Tom Postmes, Katherine Stroebe, Alwin Stegeman, Susanne Scheibe, Nico W. Van Yperen
Publikováno v:
Personality and Social Psychology Bulletin, 43(3), 418-433. SAGE Journals
The perceived possibility of movement between groups, referred to as permeability of group boundaries, is considered a key factor in explaining intergroup relations. However, so far, permeability has been conceptualized in different ways and there ex
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::194bcc20fb0740f8e0f388b11d3ea52d
https://doi.org/10.1177/0146167216688202
https://doi.org/10.1177/0146167216688202
Autor:
Alwin Stegeman
Publikováno v:
Computational Statistics & Data Analysis, 99, 189-203. ELSEVIER SCIENCE BV
In the common factor model the observed data is conceptually split into a common covariance producing part and an uncorrelated unique part. The common factor model is fitted to the data itself and a new method is introduced for the simultaneous estim
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::44610cab10f7603d6e0f6ddcd2d4e0e6
https://doi.org/10.1016/j.csda.2016.01.012
https://doi.org/10.1016/j.csda.2016.01.012
Publikováno v:
British Journal of Mathematical and Statistical Psychology, 69(2), 105-121. Wiley
Maximum likelihood estimation of the linear factor model for continuous items assumes normally distributed item scores. We consider deviations from normality by means of a skew-normally distributed factor model or a quadratic factor model. We show th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::defc2a1689469ad41a8474931ee5fc6a
https://hdl.handle.net/11370/0abc1161-3713-403d-8aa9-1a9a19016e5a
https://hdl.handle.net/11370/0abc1161-3713-403d-8aa9-1a9a19016e5a
Autor:
Alwin Stegeman, Tam T. T. Lam
Publikováno v:
Psychometrika, 79(3), 426-443. SPRINGER
A three-mode covariance matrix contains covariances of N observations (e.g., subject scores) on J variables for K different occasions or conditions. We model such an JK×JK covariance matrix as the sum of a (common) covariance matrix having Candecomp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eea5ec5ac8b851ca7991e07ed2dc0cab
https://research.rug.nl/en/publications/2fd8186c-3209-4b6f-b537-2ffcf98eb443
https://research.rug.nl/en/publications/2fd8186c-3209-4b6f-b537-2ffcf98eb443
Autor:
Alwin Stegeman
Publikováno v:
SIAM Journal on Matrix Analysis and Applications, 34(2), 624-650
A best rank-$R$ approximation of an order-3 tensor or three-way array may not exist due to the fact that the set of three-way arrays with rank at most $R$ is not closed. In this case, we are trying to compute the approximation results in diverging ra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9c7694a33b0dd1d9de41f6342cbb6749
https://doi.org/10.1137/120875806
https://doi.org/10.1137/120875806
Autor:
Alwin Stegeman
Publikováno v:
Psychometrika. 83(1)
A new model for simultaneous component analysis (SCA) is introduced that contains the existing SCA models with common loading matrix as special cases. The new SCA-T3 model is a multi-set generalization of the Tucker3 model for component analysis of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::68af00dc879ed94c483e5e4060549366
https://pubmed.ncbi.nlm.nih.gov/28386813
https://pubmed.ncbi.nlm.nih.gov/28386813
Autor:
Alwin Stegeman
Publikováno v:
SIAM Journal on Matrix Analysis and Applications, 33(2), 291-316
Fitting an R-component Candecomp/Parafac (CP) decomposition to a multiway array or higher-order tensor ${\cal Z}$ is equivalent to finding a best rank-R approximation of ${\cal Z}$. Such a best rank-R approximation may not exist due to the fact that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b669bbc9a727a88a016ca683edd5c276
https://research.rug.nl/en/publications/0ab0fe27-60c9-4058-b784-973a192bc578
https://research.rug.nl/en/publications/0ab0fe27-60c9-4058-b784-973a192bc578
Autor:
Tam T. T. Lam, Alwin Stegeman
Publikováno v:
SIAM Journal on Matrix Analysis and Applications, 33(4), 1250-1271
In this paper, we derive improved uniqueness conditions for a constrained version of the canonical order-3 tensor decomposition, also known as Candecomp/Parafac (CP). CP decomposes a three-way array into a prespecified number of outer product arrays.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::db7b90cc2de3212f9f59bf356c1d17d1
https://doi.org/10.1137/110847275
https://doi.org/10.1137/110847275