metaSEM
guchriste
Joined: 08/31/2018
METASEM with 3 variables
Hello,
We would like to conduct a METASEM for a model with three variables: Mov (dependant); Psy & pai (independent).
I used the R codes available in Cheung and in Hagger 2018. Unfortunately, I have an error to determine the indirect effect of Pai on Mov through Psy. I can only have the direct effects between the three variables.
I think the problem occurs in stage 2 :
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Arant
Joined: 01/23/2017
Cov is not positive definite in tssem2
Hi Mike,
Thank you so much answering all these questions on this forum. I was able to solve a lot of practical problems I ran into in my study.
But I am not sure how to solve this one properly: (code and data attached)
I successfully ran the tssem1 with my data, and was informed the Cov is not positive definite in the second stage.
I am a little bit confused as the result for tssem1 looks normal.
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khaliduni
Joined: 05/24/2018
TSSEM_stage2: issue with CIs. And a multiple effect sizes for the same variable
Hi all,
First of all, I'd like to say thank you to Professor Mike for his efforts in helping all of those who are using his incredible metaSEM package.
Recently, I successfully managed to conduct TSSEM. But, I have some issues with the CIs. The results of stage 2 don't show some of CIs . So, I'm not sure if I'm missing something. (R script, including data, is attached).
Deng xiaoping
Joined: 03/30/2018
How to write the syntax of bifactor model for Big Five Model by the metaSEM
Hi Mike
I have wrote a paper by metaSEM. Now，I am testing the bifactor model for the Big Five model by metaSEM, but I met dfficulties in the stage 2. I written the syntax on the basic of A higher-order confirmatory factor analytic model for the Big Five model(from the book Meta-Analysis A Structural Equation Modeling Approach), but the result was "Error in if (pchisq(chi.squared, df = df, ncp = 0) >= upper) { : missing value where TRUE/FALSE needed".
I'll always be very very grateful for your suggestion.
PeterK
Joined: 03/20/2018
Error in metasem, tssem2, “operations are possible only for numeric, logical or complex types”
I try to estimate parameters in a meta-analytical path model, where A -> B -> C (full mediation) based on a list of correlation matrices in metaSem.
My A1 matrix is as follows:
A1 <- create.mxMatrix(c(0, 0, 0,
indep2med, 0, 0,
0, med2dep, 0),
type="Full", byrow=TRUE, ncol=3, nrow=3,
as.mxMatrix=TRUE)
dimnames(A1)[[1]] <- dimnames(A1)[[2]] <- variable.labels
Eleanor
Joined: 09/12/2017
Problem in "tssem1"
Hi Mike and all,
I'm a new learner of meta-analysis and just try to use metaSEM.
My dataset comprises 90 sets of 19*19 correlation matrix and every one contains some missing values. I'm trying to estimate a TSSEM model but encounter a problem in the first stage.
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MaxScott
Joined: 01/01/2018
Errors while including covariates to metaSEM
I'm attempting to add covariates to network meta-analytic model that I`m fitting in metasem. As i know, the network meta-analytic model is designed to model comparisons betwixt a reference group and a set of alternative groups. Each comparison between the reference and other groups is modeled as a independent outcome.
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ZHIHONG REN
Joined: 12/11/2017
Why I can not get the Goodness-of-fit indices?
Dear Professor Cheung,
I used metaSEM for structural equation meta-analysis to test the mediation model. However, it is impossible to draw a suitable fitting index.
(ex.
TLI -Inf
CFI 1.00
AIC 0.00
BIC 0.00
)
I don't know whether there is a grammar problem, could you please help me to check it? All data, syntax, and model diagrams are in the attachment.
sorin.valcea
Joined: 05/31/2017
Credibility Intervals
Hello all!
Is there a way to obtain credibility intervals in MetaSEM?
Thanks!
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Xie
Joined: 12/23/2015
The Missing Coefficients in metaSEM
Hi Mike,
I am running the metaSEM for a mediation model. The results seem good. But when I tried to extrcat the cofficients, there is a problem. In this model, there are three indepent variables and there should be three correlation coefficients between those three variables as well. But in the summary and coef results, there is only one correlation coefficients, cor = 0.43. I want to report all coefficients in my meta-analysis. So could you please check my code and tell me how to read those three correlation coefficients?
Here is my code.
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