Third Party Software
hampusgronvall
Joined: 05/24/2023
Wildly different results using combined data vs dzData and mzData for umxACE?
Hi there!
When I run umxACE on the same data-set using either the data argument versus dzData and mzData arguments, I get wildly different results. I noticed this when working on my own data that I unfortunately can not share, but it's also replicated in the twinData sample set. Is there something I'm misunderstanding here?
Thanks!
Hampus
Code:
j.aitken
Joined: 06/30/2021
Multivariate vs. Multilevel Meta-Analysis
Hello,
I am reaching out with a question about the appropriateness of a multivariate vs. multilevel meta-analytic model for some data that I am collecting.
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noamMai
Joined: 03/20/2023
interpreting a bivariate ACE model with negative variance using umxACEv
Hi all,
The short form of my question is: is there a way to model a bivariate model using umxACEv, where the model for one variable is ACE (or its submodels) and the model for the other variable is ADE (or its submodels)?
It seems from [this thread](https://openmx.ssri.psu.edu/thread/4172) that this is theoretically possible, but I'm unsure if the umx syntax enables it.
lf-araujo
Joined: 11/25/2020
umx multigroup not printing out CIs for all parameters, but only for one group?
Hi all,
Hopefully the hangover from Boulder has passed when you read this :)
I want the CIs from this multigroup SEM, but it is only printing out the paths for males (I think). Here is the MWE, data in the attached:
m1 <- " # RI-CLPM with 3 timepoints
# latents
psy_0 =~ saps_0 + sans_0
psy_24 =~ saps_24 + sans_24
psy_48 =~ saps_48 + sans_48
# random intercepts
ri_psy =~ 1*psy_0 + 1*psy_24 + 1*psy_48
ri_vol =~ 1*total_gray_vol_0 + 1*total_gray_vol_24 + 1*total_gray_vol_48
wang2022
Joined: 11/26/2022
Help deal with an error message: "1:(rsum * csum) : NA/NaN argument"
Dear Dr. Cheung and Colleague,
I hope everyone is staying safe and having a wonderful holiday season!
We are currently conducting an metaSEM with a massive dataset: 1008 studies/matrices with 12 variables. Admittedly, there are quite many missing values in the dataset. However, we make sure that each cell has at least 10 data points from the primary studies (see “study counts5” in the attachment).
gdash
Joined: 11/29/2021
Troubleshooting umxGXEbiv error
Hello,
I am trying to run a bivariate moderation model with a continuous moderator that varies across co-twins (which I am very new to!). When I try to run the model, I receive the following error (using Tryhard also throws errors):
"Error incurred trying to run model: model = mxTryHard(model) might help?
assignment of an object of class “list” is not valid for @‘values’ in an object of class “FullMatrix”; is(value, "matrix") is not TRUE"
Might you be able to advise on the source of this error and how to remedy?
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Srikanth
Joined: 12/28/2016
TSSEM Setup Model Comparison With Different Constructs in Each Model
Dear Mike and Colleagues,
Greetings! I hope you are well.
I am working on a TSSEM project where the study aims to compare three competing models and pick the “best” model. I have attached a file titled _Figure Model 1,2,&3.png_ to illustrate the three models. I am writing this post to run through my analyses and ask a few questions regarding the same. It would be of immense help if you could please throw some light.
mjus
Joined: 04/17/2021
Inclusion of Control Variables in Multiple Mediation Analysis - OSMASEM
Dear Prof. Cheung & colleagues,
first of all I would like to thank all active members of the forum and of course especially Prof. Cheung for the numerous help and forum entries. The many practical examples and many resources here on the forum are a wonderful source of knowledge and facilitate one's own research immensely.
AndrewLivingstone
Joined: 06/01/2022
Advice for '"aCov" is not positive definite' error
Dear Mike and forum
I’d be very grateful for any advice on a problem running a tssem testing indirect effects. It is a ‘mini’/internal meta-analysis of three studies which assessed the same variables in different samples. The model has 3 predictors, 2 mediators, and one outcome variable per analysis.
For five out six outcome variables (run in separate models), all is well – but for one (self-esteem), I get the following error after getting to the tssem2 stage:
iana
Joined: 10/16/2021
How to generate A matrice and S matrice for the second stage of TSSEM?
Hi Milke and all,
I'm trying to run a TSSEM to examine the mediation effect for a meta-analysis. However, I'm not sure what's the appropriate way to create the A matrice and S matrice needed for stage 2. Would you please advise?