metaSEM
tbates
Joined: 07/31/2009
This forum is about the metaSEM package for meta-analysis
Mike Cheung's metaSEM package is introduced here
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quentin123
Joined: 11/18/2024
Deleted - Answered already
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miljanski
Joined: 09/13/2024
Testing publication bias when using 3-level meta-analysis
Hello everyone,
I have read through the metaSEM manual, and almost all of the articles and tutorials that prof. Cheung published on his gihtub but can't seem to find the answers to two relatively unrelated questions, and hope that you will be able to provide guidance.
jennies001
Joined: 10/19/2023
Using "mxAlgebras" to compare indirect effects
Hi community,
I am currently using the wls() function from the MetaSEM package to conduct mediation analysis with two parallel mediators. My code successfully estimates the indirect effects and their significance using likelihood-based confidence intervals. However, I am curious about estimating the difference between these indirect effects (e.g., between the two indirect effects).
janekim
Joined: 04/21/2024
TSSEM 2
Hi, Dr. Cheung,
My name is Jane Kim and I'm working on the TSSEM using https://sjak.shinyapps.io/webMASEM/.
#1.
I attempted to generate the unrestricted average correlation and summary output of fitting a multivariate meta-analysis with the tssem() function of metaSEM. However, an error has occurred. Please help me solve this error.
#2.
I am not sure how to deal with the missing values. Another dataset using 10 studies has some duplicates in correlations. Do I need to average each correlation?
Thank you so much,
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verdendi
Joined: 05/05/2024
How to do a pairwise deletion for TSSEM1 and 2
Hello everyone,
I hope you are doing well.
I am trying to do meta analysis for SEM papers, using TSSEM1 and 2 functions in MetaSEM packange.
It would be highly appreciated if you answer how we can use a pairwise deletion approach with TSSEM 1 and 2 functions.
The scope of literature for our meta analysis is quite broad and there are many missing values for pairs of the variables. I cannot use a normal way to pool the correlation matrix by using TSSEM 1. So I decided to do a pairwise deletion approach.
jennies001
Joined: 10/19/2023
Defining Level 2 clusters in three-level meta-analysis
Hello community,
I've recently been exploring the fascinating method of three-level meta-analysis for handling dependent effect sizes and incorporating correlations among them. In my research, I came across an insightful guide by Cheung (2019) that highlights the benefits of this approach.
Kwabenaaaddo
Joined: 02/01/2021
Help: TSSEM Mediation model
Dear community,
I trust you are doing well. Thank you very much for your immense work in structural equation modelling. I'm contacting you because I'm currently working on a research project that involves implementing a two-step structural equation model.
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Bo Wang
Joined: 03/19/2024
warning message when using metaSEM
We want to use metaSEM to conduct a mediation model based on four samples using TSSEM. There was a warning message in the summary of the output from the tssem1 function. The following is the R script we used to run the analysis:
### Insert correlation matrices
M2_Study_2a <- data.matrix(data.frame(
IV = c(1, 0.236, 0.360),
M = c(0.236, 1, 0.247),
DV = c(0.360, 0.247, 1)
))
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ambrush
Joined: 01/15/2024
NA values of standard errors, z values, and p-values in my metasem output (simple mediation model)
Dear Mike and all,
First off, thanks for this great forum and for directing me to ask questions here!
I used the metasem package to test some simple mediation models (IV->Med->DV, with the direct effect included). The script is attached.