Linked Questions
11 questions linked to/from Repeated measures ANOVA with lme/lmer in R for two within-subject factors
233
votes
3
answers
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R's lmer cheat sheet
There's a lot of discussion going on on this forum about the proper way to specify various hierarchical models using lmer.
I thought it would be great to have all ...
26
votes
2
answers
23k
views
Why do lme and aov return different results for repeated measures ANOVA in R?
I am trying to move from using the ez package to lme for repeated measures ANOVA (as I hope I will be able to use custom ...
- 14.4k
28
votes
2
answers
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Does it make sense for a fixed effect to be nested within a random one, or how to code repeated measures in R (aov and lmer)?
I have been looking through this overview of lm/lmer R formulas by @conjugateprior and got confused by the following entry:
Now assume A is random, but B is fixed and B is nested within A.
...
- 107k
14
votes
2
answers
7k
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What is the lme4::lmer equivalent of a three-way repeated measures ANOVA?
My question is based on this response which showed which lme4::lmer model corresponds to a two-way repeated measures ANOVA:
...
- 14.4k
7
votes
1
answer
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Is there a way to specify a lme model with more than one within-subjects factor?
The data
Suppose we have a dataset d with two between-subject factors (i.e., groups), group and ...
- 14.4k
1
vote
1
answer
2k
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Specifying mixed-linear model in lme() for pre-/post-treatment design
Dear crossvalidated community!
I am analyzing a data of a study in which every participant's performance in a memory task was measured twice (once under placebo, once under drug treatment in random ...
- 2,793
4
votes
1
answer
2k
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Two-way mixed effects ANOVA model
Consider the two-way ANOVA model with mixed effects :
$$
Y_{i,j,k} = \underset{M_{i,j}}{\underbrace{\mu + \alpha_i + B_j + C_{i,j}}} + \epsilon_{i,j,k},
$$
with $\textbf{(1)}$ : $\sum \alpha_i = 0$...
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2
votes
1
answer
2k
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r - 2-way Repeated Measures ANOVA - different degree of freedom among ezAnova, aov and lme [closed]
I would like to run a simple repeated measures ANOVA with 2 factors (Food & Drink).
Let's have a dummy df:
...
- 23
3
votes
0
answers
1k
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Repeated measures on split plot design with blocking
This is the first time I'm posting a question here. I have regularly been using the questions and answers here as example solutions for my problems, and searching has always helped me figure things ...
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4
votes
0
answers
221
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Syntax differences between aov and lmer for two-way repeated measures design
I'm working with the following data frame using R. It consists of measurements obtained from 7 subjects with two independent variables (IV1 and ...
- 323
2
votes
0
answers
112
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Which random effects should be included in my mixed-effect model? Repeated measures design with 3 within-subject factors
I am considering a design where the dependent variable ('DV') is measured in each subject ('Sub') for each level of three factors ('TH', 'A', and 'B'). From what I understand this is a repeated ...
