Questions tagged [mixed-model]
Mixed (aka multilevel or hierarchical) models are linear models that include both fixed effects and random effects. They are used to model longitudinal or nested data.
10 questions from the last 30 days
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Which test do I use to estimate the preference of species?
I have a question about how to analyse my dataset and would really appreciate your advice.
My data consist of observations of a set of target plant species collected during field surveys. The surveys ...
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0
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0
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Modelling G x E interactions in linear and mixed models
I have performed two GWAS for a phenological trait over two year (one analysis for each year) and got different SNPs driving the trait each year. I want to assess whether there is a "year effect&...
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2
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Inflation of p-values of likelihood-ratio tests in longitudinal data analysis, Part 2
This post is a follow‑up to my earlier question:
Inflation of p-values of likelihood-ratio tests in longitudinal data analysis.
We assume a parallel group design of two randomized groups where
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0
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Mixed-effects modeling of ERP data: topographic factors, ROI selection, and circularity concerns
I'm analyzing ERP data (128 electrodes) with lmer in R and would appreciate your feedback on my modeling strategy. My experiment involves testing the interaction between two experimental factors (...
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2
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1
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Degrees of Freedom Question for mixed-design Experiment
I have an experiment with 1 between-subjects variable and 1 within-subjects variable. The between subjects variable is group and there are 2 groups. The within-subjects variable is design and has 2 ...
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5
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1
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105
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Application of step function for time dependent covariates in coxme?
In one of my dissertation chapters, I am using survival analysis to assess time to next birth following calf loss in a wild dolphin population to address costs to female fitness. My question is about ...
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2
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1
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How to properly model repeat measurements within individuals, individuals sampled across two time scales (random effects?)
I'm trying to test whether a certain attribute of a species is predictive of a behavior. I have multiple repeat measurements of the behavior for a number of different individuals (unequal sample sizes)...
- 429
1
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1
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56
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How should data from multiple experiments with different panel sizes and demographics be handled?
I am working with historical sensory evaluation data and would appreciate advice on how to structure the data for machine learning modeling.
Over the past several years, our lab has conducted many ...
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6
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2
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209
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Inflation of p-values of likelihood-ratio tests in longitudinal data analysis
I am interested in longitudinal data analysis, and I am concerned about
valid inference in mixed models.
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1
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0
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31
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Predicted probabilities from a multilevel model with factor levels [closed]
I'm trying to predict probabilities from a zero-inflated count model using glmmTMB and running into issues with predicting new values to plot.
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