metaSEM
sorin.valcea
Joined: 05/31/2017
OpenMX Status: 5
Hello all,
I am getting status 5 for some analyses and am not sure why. I am including the code and output below. There are 4 clusters and 9 effects. Any idea what is causing it?
Thanks!
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GerardCY
Joined: 05/12/2017
Error in Mixed-effects Multivariate Meta-analysis
Dear Sir,
Xie
Joined: 12/23/2015
About the mixed-effects model in multivariate meta-analysis by using metaSEM
Hi Mike,
I am trying to conduct a multivariate meta-analysis by using metaSEM. I reviewed your article Cheung, M. W. L. (2014). metaSEM: An R package for meta-analysis using structural equation modeling. Frontiers in Psychology, 5. In the supplementary material, you provided some examples. In terms of the second example in section 3, you used the data set reported by Aloe et al. (2014).
Arin A
Joined: 07/04/2016
MetaSEM with raw data sets with missing values
Dear all,
I am trying to conduct a metaSEM on four data sets which contain missing values. I have the codes I've used to calculate the estimates and their confidence intervals with the full data sets (missing values imputed using ML), and which worked perfectly.
However, when I am repeating the same analysis with the raw data sets with no imputations, I get error messages at the fixed2 stage, and for calculating the confidence intervals, I get NA for the Upper and Lower bounds.
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myng
Joined: 03/21/2017
TSSEM near 0 heterogeneity variances and Hessian matrix error
Dear Mike and other users,
I am doing random effects TSSEM and had run into problems with openmx status=6 with tssem1(). In earlier communication with Mike, he noted that some of the heterogeneity variances (I2) were near 0 (e.g., .0000, .0001) and said that tssem1() does not handle them well. Thus he suggested fixing the near 0 heterogeneity variances to 0, and letting the larger heterogeneity variance vary with starting value 0.01, then running tssem1() with this user-defined structure:
Srikanth
Joined: 12/28/2016
NA in Indirect Effects for 95% likelihood based CI’s metaSEM
Dear Mike and Others,
I am trying to estimate a random effects tssem for my dissertation.I have read your book and related papers. I am following the wonderful resources provided by you and your team. My goal is to perform some moderator analyses using categorical variables, after I successfully run the tssem model.
I am attaching my R script and the structural model image. In this data and model, I found 2 issues, and have 2 clarifications.
Arant
Joined: 01/23/2017
Code 6 Error in the second stage
Hi all, Hi Mike,
I really appreciate Mike's guidance in TSSEM.
I recently encountered the code 6 error (http://openmx.ssri.psu.edu/wiki/errors) in the last step of my TSSEM analysis.
I think it might be because there are too many missing values in the data: after I deleted rows with two NAs, it worked.
I am just wondering if there are any alternative solutions for code 6 error in TSSEM? I noticed that mxTryHard can be used to get a better result but I am not so sure about it....
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Srikanth
Joined: 12/28/2016
"Cov" is not positive definite.
Dear Mike and Others,
I am trying to estimate a random effects tssem for my paper.I have read your book and related papers. I am following the wonderful resources provided by you and your team. My goal is to perform some moderator analyses using categorical variables, after I successfully run the tssem model.
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Xie
Joined: 12/23/2015
A question about latent variables in MASEM
Hi Mike
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Xie
Joined: 12/23/2015
Use MASEM to explore several potential mediators
Hi Mike,
I have reviewed several MASEM articles as well as the R code. I am excited that it could examine mediation model. However, I found the R code of meta-analytic structural equation modeling which examined only one mediator. Now I want to exam a structural model with three mediators by using MASEM. So, I am just wondering is that possible to use MASEM to explore several potential mediators. If so, please let me how to find the R code.
Thanks a lot,
Yu Xie