Meta-Analysis Resources

Tools for Those Who Summarize the Evidence Base

Resources and networking for those who conduct or interpret meta-analyses related to any phenomenon that is gauged in multiple studies.

Katherine DiVasto
  • New York, NY
  • United States
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Mei Yi Ng replied to Katherine DiVasto's discussion Addressing large matrices with missing information with MASEM in metaSEM in the group Meta-analytic structural equation modeling
"Dear Mike, Thanks for letting us know that there are no simple or clear guidelines. I guess we just have to make a decision now based on what is practical for extracting data from studies, and then later use a trial-and-error approach to reduce…"
Jul 21, 2016
Mike Cheung replied to Katherine DiVasto's discussion Addressing large matrices with missing information with MASEM in metaSEM in the group Meta-analytic structural equation modeling
"Dear Mei Yi, I am afraid that I don't know any simple guidelines. If fact, I don't think that it is easy to derive such guidelines. There are a couple of factors affecting it. For example, the no. of variables, the percentages of missing…"
Jul 18, 2016
Mei Yi Ng replied to Katherine DiVasto's discussion Addressing large matrices with missing information with MASEM in metaSEM in the group Meta-analytic structural equation modeling
"Dear Mike,  Thank you for your quick response and for directing us to the related thread. The thread provides useful suggestions on what to do when missing data lead to a nonpositive definite matrix. What we need now in general guidance on how…"
Jul 18, 2016
Katherine DiVasto added a discussion to the group Meta-analytic structural equation modeling
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Addressing Large Matrices with missing information in MASEM in metaSEM

Hi Dr. Cheung and MASEM users,Our team is currently working to conduct a MASEM analysis on 40 studies assessing a multiple mediator model with treatment condition as a dichotomous predictor, posttreatment symptoms as the outcome, multiple mediators at posttreatment, and pretreatment symptoms and mediators as covariates. Some studies only reported data for some mediators, and other did not report data on any mediator, but all reported data for outcomes. We know that too much missing data can…See More
Jul 14, 2016
Mike Cheung replied to Katherine DiVasto's discussion Addressing large matrices with missing information with MASEM in metaSEM in the group Meta-analytic structural equation modeling
"Dear Mei Yi Ng & Katherine, It is not easy to give a simple rule. You may consider a random-effects meta-analysis as a simple analysis in estimating the means and covariance matrix of the effect sizes. There are 7 variables in your model. Thus,…"
Jul 7, 2016
Katherine DiVasto added a discussion to the group Meta-analytic structural equation modeling
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Addressing large matrices with missing information with MASEM in metaSEM

Hi Dr. Cheung and MASEM users,My apologies if I am double posting this topic as I am new to the site. Our team is currently working to conduct a MASEM analysis of 40 studies assessing a multiple mediator model with treatment condition as a dichotomous predictor, posttreatment symptoms as the outcome, multiple mediators at posttreatment, and pretreatment symptoms and mediators as covariates. Some studies only reported data for some mediators, and other did not report data on any mediator, but…See More
Jul 7, 2016
Katherine DiVasto joined Mike Cheung's group
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Meta-analytic structural equation modeling

A technique to synthesizing correlation/covariance matrices for the purpose of fitting structural equation models.
Jul 6, 2016
Katherine DiVasto is now a member of Meta-Analysis Resources
Jul 6, 2016

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