Search found 162 matches

by billb
Mon Sep 16, 2024 7:39 am
Forum: R2MLwiN user forum
Topic: Binary outcome Multiple membership model
Replies: 15
Views: 188521

Re: Binary outcome Multiple membership model

Hi again,
So it is probably important to pay attention to my comment about the challenges with multiple membership models in using VPC but I assume here you mean a standard multilevel model. I think your logic of if the total VPC for levels 2 and 3 is 10% with 4% at level 3 then clearly 40% of the ...
by billb
Tue Sep 03, 2024 2:12 pm
Forum: MLwiN user forum
Topic: 3 level multilevel model with only two time points
Replies: 1
Views: 44619

Re: 3 level multilevel model with only two time points

Two time points at level 1 should be no problem however you may consider constructing the change response post-pre and thus reducing your 3 levels to 2 levels. You could still use the pre response column as a predictor if you wanted to look at the impact of pre-value on size of change. Hope that ...
by billb
Fri Jun 14, 2024 1:41 pm
Forum: MLwiN user forum
Topic: Multivariate MLM adding common coefficients
Replies: 2
Views: 50395

Re: Multivariate MLM adding common coefficients

Hi Katekeri,

I think this might be a slight misunderstanding. Essentially if I consider a 2 response case - say I am looking for predictors for weight and height and to make life simple then I have age as a predictor then the correct thing would be to have both the intercept and age as separate ...
by billb
Tue May 28, 2024 3:37 pm
Forum: MLwiN user forum
Topic: Correcting for type 1 error in mlwin
Replies: 4
Views: 49423

Re: Correcting for type 1 error in mlwin

Not for fixing the issue of multiple comparisons as bootstrapping will not help with that.
by billb
Tue May 28, 2024 11:37 am
Forum: MLwiN user forum
Topic: Correcting for type 1 error in mlwin
Replies: 4
Views: 49423

Re: Correcting for type 1 error in mlwin

I would imagine if you don't want to do Bonferroni then you could try something like Benjamini & Hockberg's FDR which is less conservative (false discovery rate) and I believe could be used for most models. Don't think there is an estimation procedure related approach like tweaking IGLS here.
by billb
Wed May 22, 2024 3:52 pm
Forum: R2MLwiN user forum
Topic: Binary outcome Multiple membership model
Replies: 15
Views: 188521

Re: Binary outcome Multiple membership model

Hi,
I think the fact level 2 is nested within level 3 is fine here as for MCMC nested is simply a special case of the more general cross classified model - just need to make sure that your IDs are unique i.e. if you have a reader 1 that this is the same person throughout and if say you have a ...
by billb
Fri Jun 30, 2023 6:52 pm
Forum: MLwiN user forum
Topic: Non-linear repeated measures 3-level (Or maybe 2-level!) modelling
Replies: 4
Views: 54768

Re: Non-linear repeated measures 3-level (Or maybe 2-level!) modelling

Hi John,
Thanks for the clarification. I'd therefore call the measures age 4 and age 5 rather than baseline and follow up. Then 3-levels might make more sense and you could include age as a predictor to control for age related differences perhaps with age related interactions which would pretty ...
by billb
Fri Jun 30, 2023 4:44 pm
Forum: MLwiN user forum
Topic: Non-linear repeated measures 3-level (Or maybe 2-level!) modelling
Replies: 4
Views: 54768

Re: Non-linear repeated measures 3-level (Or maybe 2-level!) modelling

Hi John,
Presumably when you talk about a quadratic relationship you are talking globally as having only 2 measures per child would not allow anything more than a linear relationship at the child level. When someone uses terms like baseline and follow-up it suggests something happens in between ...
by billb
Tue Jun 27, 2023 6:14 pm
Forum: MLwiN user forum
Topic: About creating pseudo-levels
Replies: 3
Views: 52604

Re: About creating pseudo-levels

Hi Cesarroga,
I can recommend my paper on this https://rss.onlinelibrary.wiley.com/doi ... 04.00365.x which looks at partitioning variation in a logistic model with overdispersion and has a similar example of counts for different categories.
Best wishes,
Bill.
by billb
Tue Jun 27, 2023 1:12 pm
Forum: MLwiN user forum
Topic: About creating pseudo-levels
Replies: 3
Views: 52604

Re: About creating pseudo-levels

Hi Cesarroga,
You should be able to code logistic regression examples where the denominator is not 1 so that you can then model the 6 proportions as 6 couplets (y,n) one per row in the dataset and nest these within small areas. In MLwiN you would have as you say the same levels as level 1 and level ...