metaSEM
Xin Lin
Joined: 06/10/2019
Do we need to avoid a saturated model?
Dear Dr. Cheung,
I used Lavaan to specify my model. Do I need to declare the correlations among the mediator variables besides the correlations among the independent variables?
After adding all paths to the model, I got a perfect fit model, which will be of little use statistically.
Thanks,
Xin
- Read more about Do we need to avoid a saturated model?
- 2 comments
- Log in or register to post comments
Xin Lin
Joined: 06/10/2019
Control Covariates in metaSEM
Hi all,
Can we control covariates (i.e., age, SES, problem type) in metaSEM? To be more specific, can I add them directly to the model like regression?
Thank you!
- Read more about Control Covariates in metaSEM
- 6 comments
- Log in or register to post comments
aexwtt
Joined: 03/05/2020
Inquiry about handling missing data with moderators of more than three categories~
Dear Mike,
This is Wen-Ta from Department of Applied Foreign Languages, National Taiwan University of Science & Technology.
I am very interested in meta-analysis and now applying your metaSEM package to my research project.
May I possibly ask a question about handling missing data with moderators of more than tree categories:
GregoryVerleysen
Joined: 02/26/2020
metaSEM questions
I am learning how to use metaSEM, but I am running into some issues.
Right now I only have 3 studies available to run the analysis (code with data is in attachment).
I am running into the following issues and was wondering if these would be caused by having only 3 studies
or am I doing something wrong here?
- Read more about metaSEM questions
- 1 comment
- Log in or register to post comments
ucjtcio
Joined: 01/31/2020
autofixtau2
Hi,
I've been using the rerun() function with the autofixtau2 argument, which is leading our models to converge. While I appreciate that it may be choosing suitable starting values for estimated parameters, I’m not entirely sure how the models have converged ( low number of studies and small N). In an effort to ‘fix’ tau2 could it end up running a fixed effects model? Are there conditions where autofixtau2 should/should not be used and how it should be interpreted?
- Read more about autofixtau2
- 5 comments
- Log in or register to post comments
pascofearon
Joined: 05/07/2013
Robert Balazsi
Joined: 10/24/2019
Many missing correlations
Dear Mike,
I am currently working on a metaSEM study. I've got some error, even I tried to use different methods (see below!). I also asked for a pattern of NA. I would like to ask if, in your opinion, the error messages are related to missing correlations? I have 379 lines, but only 1 or 2 correlations for some variables. Is there a way to continue this study? Maybe dropping some variables?
All the best,
Robert
- Read more about Many missing correlations
- 36 comments
- Log in or register to post comments
pascofearon
Joined: 05/07/2013
mediation in OSMASEM
I was wondering whether you could point me to information about how to pass algebraic statements to OpenMx via the osmasem function so that I can test indirect effects – in tssem2 this is done easily, but it’s not so obvious with osmasem. The documentation for osmasem doesn't seem to go into detail about this. I suspect it could be done with the mxModel.args option, but as I don’t know my way around OpenMx all that well I had trouble figuring out how…
Thanks!
Pasco
- Read more about mediation in OSMASEM
- 5 comments
- Log in or register to post comments
vildan Bağcı
Joined: 12/04/2019
Complex data anaysis in REM doesn't result
Dear Mike & colleagues,
First of all, I am grateful for asking my question to this forum where gurus of meta-SEM are helping people like me.
I'm trying to make analysis in your metasem package. I have 41 studies and so 41 correlation matrices. and the correlation matrices consist of 20x20.
- Read more about Complex data anaysis in REM doesn't result
- 17 comments
- Log in or register to post comments
aqzhou
Joined: 10/21/2019
OpenMx status1: 6
Hi All,
Thanks in advance for your help and time! It is much appreciated.
I have 11 datasets (15 variables: 3 latent/3 indicators each, 2 observed DVs, 4 control variables) and am interested in using TSSEM. However, I'm running into errors and am getting stuck at stage 1. I have uploaded my data, syntax, and output.
- Read more about OpenMx status1: 6
- 4 comments
- Log in or register to post comments