All Questions
6 questions
0
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How to run a sensitivity power analysis for linear mixed modeling (lme4 and simr)?
We conducted a behavior change field experiment using the following variables:
Two time points (T0, T1)
Two groups (intervention vs. control)
Individual ID (n = 62 in group 1, n = 53 in group 2)
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- 23
1
vote
2
answers
74
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Mixed model: Which parameters to provide for sample size calculations?
I am currently planning an analysis in a relatively new area of research and would like to provide data that will allow for future power analyses. Unfortunately, I am completely lost in the ...
- 433
3
votes
1
answer
1k
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Calculating minimum sample size required for repeated measures linear mixed model using the simr package
I would like to use the simr package to calculate the smallest sample size needed to achieve $0.80$ power at the $0.05$ alpha level while accounting for a small ...
- 31
2
votes
1
answer
542
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Power analysis for simple LMER model in R from scratch
I'd like to compute power for some rather simple lmer models. I am aware of some packages like simr but the tutorials are not easy to follow because they ...
0
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0
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74
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How to simulate monotonic data with constrained range?
I'm running simulations for a power analysis for a negative binomial GLMM. The dependent variable has a negative binomial distribution and will be measured at five time points. It has two other ...
- 202
1
vote
1
answer
83
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Power calculation by simulation - what do I do with model failures?
I'm trying to run a power calculation by simulation on a set of exponential decay datasets using the nlme package in R. Here's the process:
Simulate a bunch of exponentials, using some conservative ...
- 143