All Questions
Tagged with manova mixed-model
32
questions
0
votes
0
answers
11
views
Mixed modal MANOVA or something else?
I am once again asking for your help. I am developing a research proposal and I am a bit confused. I have a randomized controlled trial (RCT) for testing the efficacy of a therapeutic intervention, in ...
- 1
0
votes
0
answers
21
views
Distribution of between-group sum of squares (SSB)?
Consider a standard multivariate random effects model
$$\mathbf{X}_{ij} = \boldsymbol{\mu} + \boldsymbol{\alpha}_i +\boldsymbol{\varepsilon}_{ij}$$
for $i = 1,\ldots,m$ and $j = 1,\ldots,n_i$, and ...
- 69
0
votes
0
answers
52
views
Multivariate analysis with lmer and lmerTest
I'm dealing with compositional data (data that sum to 1). They are inherently multivariate. One way to analyse compositional data is with a ilr (isometric log-ratio) transformation. I'm following the ...
- 11
2
votes
1
answer
29
views
Which statistical test to use analyzing multivariate brain scan data (Channels, Frequency Bands, Measures)?
As a Computer Science student inexperienced in statistics, I'm looking for some advice on selecting the appropriate statistical test for my dataset.
My data, derived from brain scans, is structured ...
- 21
0
votes
0
answers
11
views
Which stats test--MANOVA or Mixed Effects?
I need to see if there's a statistical difference for each ID between CHLA, CWBA, and CH and what that difference is, AS WELL AS, if Species Type is a factor. Which R package would do this? I have the ...
- 1
0
votes
0
answers
55
views
Analysis of longitudinal data with a change in DV - SEM, MANOVA or not possible?
I have a dataset in which a (latent) construct (e.g., math performance) is measured at different time points using different psychological tests.
The first data point is comparable to an assessment ...
- 115
1
vote
1
answer
82
views
Model selection for $4\times 2\times 2$ factorial design in R
I have read so many books, forums, and sites that I have completely confused myself.
Originally, my design was a simple 4x2 factorial with two categorical predictors, but it has gotten more complex ...
- 101
3
votes
1
answer
119
views
Linear mixed model (repeated measurements) on HUGE dataset
I have a huge dataset with measurements of 21k genes across 11k samples. The measurements, called expression, represent (roughly) how "active" that gene is in the cells of the sample (in ...
- 1,138
0
votes
1
answer
206
views
How to perform ANOVA for data measured with unequal time interval?
So I have a set of patient data divided into 3 groups based upon their vision. I also have data on few variables that I believe to be relevent which are measured pre-surgery, 1 day post-surgery, and 7-...
- 1
1
vote
1
answer
95
views
Why repeated measures output gives different output than MANOVA (SPSS)?
I see that this topic was closed few days ago, because it concerns specific context (data). No actually it does not. This is something that happens with any two variables that u have (at least 2) and ...
- 151
1
vote
2
answers
3k
views
Treat year as a fixed effect, random effect, or covariate?
I have a dataset of fish species from different sites within a harbour collected over 17 years. The dataset consists of 1,042 sampling transects collected at 6 specific locations where fish were ...
- 157
0
votes
0
answers
412
views
Comparing the means of latent variables in a CFA model measured at two different times in R
I have a CFA model with 7 latent variables and about 4 items per construct, I'm using R with lavaan for the CFA, $N\approx 3500$.
My model looks like this:
...
- 159
4
votes
1
answer
60
views
Is this a proper use of mixed modeling?
I admit I'm fairly new at statistical modeling and so I'm not confident in the method I am using.
Using LC-MS/MS, I am monitoring the degree of post-translational modification of specific peptides by ...
- 43
1
vote
1
answer
303
views
Some kind of a Manova with repeated measures
I have a question that is somewhere between R and stats I guess...
Let's set up the situation: I have a test that gives 4 scores, corresponding to 4 different dimensions of a problem. We can assume ...
- 21
1
vote
0
answers
67
views
Would a repeated measures MANOVA be appropriate for a 9DV, 2IV within subjects study design?
I am trying to get an estimate of participants to strive for in my study. Being rather new to the research and stats scene, I was hoping the community could help me out a little bit?
The study has 9 ...
- 11