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.

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As I write, the first day of 2014 is fading and the new year will quickly become just a fact along the way. The reprieve from emails and demands that the holidays permit will be a distant memory. And big data will grow bigger and bigger still and require more and more help from cool research synthesis procedures and meta-analytic statistics. That's why we are here. I am teaching a graduate seminar this spring on the subject, at the University of Connecticut, and I've asked…

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Posted by Blair T. Johnson on January 1, 2014 at 4:30pm

Meta-Analysis: The Original 'Big Data'

I'm winding down after a productive sabbatical leave and of course summer's waning days. I should be working on that new course preparation (yikes, I'm teaching in a week!), but I wanted to say something about trends in recent months (and years) connected to Big Data in the media and science.

It strikes me that the original instantiation of big data is meta-analysis. Isn't it the goal of meta-analysis to pool all the relevant data into one…

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Posted by Blair T. Johnson on August 19, 2013 at 8:00am

Mastering Meta-Analysis

Most of what scholars do hinges on having sufficient skill to create meaningful assessments of knowledge and the evidence base that underlies it. Meta-analysis is a skill set you can develop if you work at it with enough deliberative practice. How much deliberate practice does it take?…

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Posted by Blair T. Johnson on December 30, 2012 at 4:00pm

Our Communal Collective

It's sunny as I write you from my home office in mid-September, where I work at home during my sabbatical leave. As you probably know, sabbaticals are a periodic break from the regular hum-drum of academic life in order to focus more concertedly on other goals, mainly scholarly.

Popular belief has it that "sabbatical" is just another word for "vacation," but it is not true, well at least not for me: It is true that I am teaching no courses until next fall (and trying hard not to think…

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Posted by Blair T. Johnson on September 20, 2012 at 3:30pm

Latest Activity

Gloria Ma added a discussion to the group Meta-Analytic Analyses and Interpretations Thereof
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minimum number of studies for conducting subgroup analysis

Dear all,I am conducting a meta-analysis on the effectiveness of an intervention on two outcomes (attitudinal and behavioral). The effect size measure is Cohen's d. After computing the Cohen's d, I want to proceed to subgroup analysis and meta-regression. I am looking for resources or answers to the 2 questions I came across below.For instance, one moderator is "interactive approach VS didactic approach", and another one is gender (male VS female). 1) Referring to the Cochrane's Handbook (…See More
Aug 17
Blair T. Johnson added a discussion to the group On-Line and Other Courses on Meta-Analysis
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David B. Wilson two-day course on meta-analysis, Sept 23-24 2016 Philadelphia

David Wilson, Instructor  September 23-24, 2016, Philadelphia Early Registration deadline is August 23See more details in this link.See More
Aug 17
Ricki Kleinman is now a member of Meta-Analysis Resources
Aug 15
Sherief Ghozy is now a member of Meta-Analysis Resources
Aug 13
Roslinda Rosli is now a member of Meta-Analysis Resources
Jul 29
Kadek Agus Surya Dila is now a member of Meta-Analysis Resources
Jul 26
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
Mei Yi Ng 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 21
Mike Cheung and James Renlund are now friends
Jul 18
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
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
Gloria Ma joined Blair T. Johnson's group
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Meta-Analytic Analyses and Interpretations Thereof

Tips and techniques for the analysis of meta-analytic databases and for interpretations of such analyses.
Jul 15
Suzanne Jak updated their profile
Jul 15
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
Gloria Ma 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 11
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

Forum

Know Your Limitations: "Data" and "Big Data" vs. "Statistics" and "Models" and the Necessity of Good Theory

If you are reading this blog, you like numbers. Perhaps you even love them. Even if you are a dedicated qualitative researcher, I’d urge you to continue reading; this blog might be even more valuable to you. And if you are a quant geek, you might…Continue

Tags: science, data science, theory, statistics, conceptual

Started by Blair T. Johnson Sep 6, 2014.

Role of methodological quality in meta-analysis 1 Reply

For a few years now, I have been doing some work related to the methodological quality (MQ) of meta-analyses and of the studies they integrate, which have both shown an increasing presence in scientific literature. As Rob Low, Hayley MacDonald and I…Continue

Tags: methodological quality, simple slopes, interactive approach, meta-regression, OQAQ

Started by Blair T. Johnson. Last reply by Blair T. Johnson Aug 26, 2014.

Post No Bills (here unless it is about meta-analysis generally; but do so in specific items to groups)

The forum is a little like a blank wall that is irresistible: It just seems to attract comments. So, let me start with a little humor:…Continue

Tags: groups, meta-analysis.ning.com

Started by Blair T. Johnson Jan 5, 2014.

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