Zobrazeno 1 - 10
of 315
pro vyhledávání: '"Gerhard Tutz"'
Autor:
Gunther Schauberger, Gerhard Tutz
Publikováno v:
Journal of Statistical Software, Vol 88, Iss 1, Pp 1-29 (2019)
In paired comparison models, the inclusion of covariates is a tool to account for the heterogeneity of preferences and to investigate which characteristics determine the preferences. Although methods for the selection of variables have been proposed
Externí odkaz:
https://doaj.org/article/c21fee63c9e6401780794e39994a0f2f
Autor:
Gerhard Tutz
This book introduces basic and advanced concepts of categorical regression with a focus on the structuring constituents of regression, including regularization techniques to structure predictors. In addition to standard methods such as the logit and
Autor:
Gerhard Tutz
Publikováno v:
Applied psychological measurement. 46(8)
A new item response theory model for count data is introduced. In contrast to models in common use, it does not assume a fixed distribution for the responses as, for example, the Poisson count model and extensions do. The distribution of responses is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5d962ea7c1ca4dae886ca30092fb2fd1
https://pubmed.ncbi.nlm.nih.gov/36262521
https://pubmed.ncbi.nlm.nih.gov/36262521
Autor:
Gerhard Tutz
Publikováno v:
Psychometrika. 87:1238-1269
A comprehensive class of models is proposed that can be used for continuous, binary, ordered categorical and count type responses. The difficulty of items is described by difficulty functions, which replace the item difficulty parameters that are typ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::99a25f29a7f4f82b9296d196eb1b5fe3
https://doi.org/10.1007/s11336-022-09865-7
https://doi.org/10.1007/s11336-022-09865-7
Autor:
Gerhard Tutz, Moritz Berger
Publikováno v:
International Statistical Review. 90:306-327
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bb854fe04e30591aa8dbd54bcb70d2b3
https://doi.org/10.1111/insr.12484
https://doi.org/10.1111/insr.12484
Autor:
Gerhard Tutz, Shahla Faisal
Publikováno v:
Information Sciences. 570:500-516
Missing values are a major problem in medical research. As the complete case analysis discards useful information, estimation and inference may suffer strongly. Multiple imputation has been shown to be a useful strategy to handle missing data problem
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5917097f14a748409e5ad65aa574ebdd
https://doi.org/10.1016/j.ins.2021.04.009
https://doi.org/10.1016/j.ins.2021.04.009
Publikováno v:
Journal of Educational and Behavioral Statistics. 46:682-716
A mixture of logit models is proposed that discriminates between responses to rating questions that are affected by a tendency to prefer middle or extremes of the scale regardless of the content of the item (response styles) and purely content-driven
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::777a30bfab4b2afec594a0bd47fb724b
https://doi.org/10.3102/1076998621992554
https://doi.org/10.3102/1076998621992554
Autor:
Gerhard Tutz
Publikováno v:
Sociological Methodology. 51:86-111
In this article, a modeling strategy is proposed that accounts for heterogeneity in nominal responses that is typically ignored when using common multinomial logit models. Heterogeneity can arise from unobserved variance heterogeneity, but it may als
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::95b6c670067faaef3e75ca7372e9deaa
https://doi.org/10.1177/0081175020979689
https://doi.org/10.1177/0081175020979689
Autor:
Moritz Berger, Gerhard Tutz
Publikováno v:
Econometrics and Statistics. 16:28-41
Investigation of the effect of covariates on income typically relies on regression models with a transformed income. An underlying assumption is that the exact income is available. However, in surveys reported income is often available in income brac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0e868b045bf60b350cefafa8fb08e153
https://doi.org/10.1016/j.ecosta.2018.12.001
https://doi.org/10.1016/j.ecosta.2018.12.001
Autor:
Gerhard Tutz
Publikováno v:
International Statistical Review
Appropriate modelling of Likert-type items should account for the scale level and the specific role of the neutral middle category, which is present in most Likert-type items that are in common use. Powerful hierarchical models that account for both
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e6158fb3ceebb4a1ef1be4896e3f0e89
https://doi.org/10.1111/insr.12396
https://doi.org/10.1111/insr.12396