All Questions
5 questions
2
votes
1
answer
35
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How can I compare one group to the mean of all other groups in a longitudinal mixed-effects regression?
I have a longitudinal mixed-effects regression comparing change in depression between two timepoints across 12 groups. I'd like to know if the control group is significantly less effective in reducing ...
- 413
1
vote
1
answer
267
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Correction for multiple comparisons using sum contrasts with linear regression
I am computing the following model using the lme4 package in R:
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- 111
0
votes
1
answer
2k
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Contrasts in logistic regression using R
I am trying to use contrasts in a logistic regression using the lme4 package.
I have two between-subject categorical variables (both with 2 levels). The first distinguishes between groups 1 and 2; the ...
1
vote
1
answer
317
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changing the coding system from helmert coding to difference coding changes regression results?
EDIT: I think I have mistaken the names of the coding systems, so I changed it (in bold). The content has not changed at all, though, so I would still appreciate any answer.
END EDIT
I'm running ...
- 197
4
votes
1
answer
7k
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How to interpret sum contrast in regression (LMM)?
I am having difficulty understanding how the results from Linear Mixed Effects model. I am examining the three different types of learning condition, condition A, B, and C. My formula using Lme4 ...
- 616