metaSEM

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No user picture. brendan Joined: 09/21/2023

Is osmasem3 in the github version of metaSEM?

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Hello,
Are the osmasem3L functions still available in the github repository?
I can see the functions were removed(?) in the most recent commit.
(If they are available, I respect that they are still in development)
Regards
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No user picture. brendan Joined: 09/21/2023

MetaSEM with odds ratios

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I have a series of studies that have reported their results as odds ratios. I can calculate the effect size and sampling variance and perform a series of meta-analyses for each predictor-outcome relationship. Now I would like to fit a path model to the data.

I assume that to do this, my next step is to convert the odds ratios to r values?
Can someone point me in the direction of what I need to do next to generate the required correlation matrix?

Thankyou in advance

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No user picture. Jimxxxx Joined: 08/26/2023

OSMASEM Interaction between Moderators

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Dear Dr. Cheung and Colleagues,

I attempted to include an interaction term and other moderators in a path model.

However, it produced unusual estimates and the following message: "The model does not satisfy the first-order optimality conditions to the required accuracy, and no improved point for the merit function could be found during the final linesearch (Mx status RED)."

Could you please provide me with some suggestions?
I have attached the R code and the dataset.
Thanks for your time and patience.

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No user picture. nguyennghia130… Joined: 07/27/2023
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No user picture. Xijian Zheng Joined: 06/10/2023

The tssem1 runs very slowly. tssem1 does not work when using a random effects model

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Dear Dr. Cheung,

Hello, recently I want to use TSSEM to determine the structure of a scale. I am pooling 30 correlation matrices of size 38x38 using the 'tssem1' function. However, tssem1 runs quite slowly, taking at least 6 hours for each computation.

Do you have any suggestions to make it run faster?

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No user picture. j.aitken Joined: 06/30/2021

Multivariate vs. Multilevel Meta-Analysis

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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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No user picture. wang2022 Joined: 11/26/2022

Help deal with an error message: "1:(rsum * csum) : NA/NaN argument"

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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).

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No user picture. Srikanth Joined: 12/28/2016

TSSEM Setup Model Comparison With Different Constructs in Each Model

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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.

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No user picture. mjus Joined: 04/17/2021

Inclusion of Control Variables in Multiple Mediation Analysis - OSMASEM

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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.

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No user picture. AndrewLivingstone Joined: 06/01/2022

Advice for '"aCov" is not positive definite' error

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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: