Results 31 to 40 of about 3,822,020 (321)

MCMC methods for multi-response generalized linear mixed models

open access: yes, 2010
Generalized linear mixed models provide a flexible framework for modeling a range of data, although with non-Gaussian response variables the likelihood cannot be obtained in closed form.
J. Hadfield
semanticscholar   +1 more source

The coefficient of determination R2 and intra-class correlation coefficient from generalized linear mixed-effects models revisited and expanded

open access: yesbioRxiv, 2016
The coefficient of determination R2 quantifies the proportion of variance explained by a statistical model and is an important summary statistic of biological interest.
S Nakagawa, P. C. Johnson, H. Schielzeth
semanticscholar   +1 more source

Meta-analysis of Proportions Using Generalized Linear Mixed Models

open access: yesEpidemiology, 2020
Supplemental Digital Content is available in the text. Epidemiologic research often involves meta-analyses of proportions. Conventional two-step methods first transform each study’s proportion and subsequently perform a meta-analysis on the transformed ...
Lifeng Lin, H. Chu
semanticscholar   +1 more source

Accessible analysis of longitudinal data with linear mixed effects models

open access: yesDisease Models & Mechanisms, 2022
Longitudinal studies are commonly used to examine possible causal factors associated with human health and disease. However, the statistical models, such as two-way ANOVA, often applied in these studies do not appropriately model the experimental design,
Jessica I. Murphy   +2 more
doaj   +1 more source

Robustness of linear mixed‐effects models to violations of distributional assumptions

open access: yesMethods in Ecology and Evolution, 2020
Linear mixed‐effects models are powerful tools for analysing complex datasets with repeated or clustered observations, a common data structure in ecology and evolution. Mixed‐effects models involve complex fitting procedures and make several assumptions,
H. Schielzeth   +9 more
semanticscholar   +1 more source

Estimating power in (generalized) linear mixed models: An open introduction and tutorial in R

open access: yesBehavior Research Methods, 2020
Mixed-effects models are a powerful tool for modeling fixed and random effects simultaneously, but do not offer a feasible analytic solution for estimating the probability that a test correctly rejects the null hypothesis.
Levi Kumle, M. Võ, Dejan Draschkow
semanticscholar   +1 more source

Violation of the Sphericity Assumption and Its Effect on Type-I Error Rates in Repeated Measures ANOVA and Multi-Level Linear Models (MLM)

open access: yesFrontiers in Psychology, 2017
We investigated the effects of violations of the sphericity assumption on Type I error rates for different methodical approaches of repeated measures analysis using a simulation approach.
Nicolas Haverkamp, André Beauducel
doaj   +1 more source

How to capitalize on a priori contrasts in linear (mixed) models: A tutorial [PDF]

open access: yesJournal of Memory and Language, 2018
Factorial experiments in research on memory, language, and in other areas are often analyzed using analysis of variance (ANOVA). However, for effects with more than one numerator degrees of freedom, e.g., for experimental factors with more than two ...
D. Schad   +3 more
semanticscholar   +1 more source

Simple reparameterization to improve convergence in linear mixed models

open access: yesActa Agriculturae Slovenica, 2010
Slow convergence and mixing are one of the main problems of Markov chain Monte Carlo (McMC) algorithms applied to mixed models in animal breeding. Poor convergence is to a large extent caused by high posterior correlation between variance components and ...
Gregor GORJANC   +3 more
doaj   +1 more source

Simultaneous Inference in General Parametric Models [PDF]

open access: yes, 2008
Simultaneous inference is a common problem in many areas of application. If multiple null hypotheses are tested simultaneously, the probability of rejecting erroneously at least one of them increases beyond the pre-specified significance level ...
Bates   +29 more
core   +3 more sources

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