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…


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…


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?…


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…


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

Latest Activity

Ye Sun is now a member of Meta-Analysis Resources
14 hours ago
Profile IconMagda Formanowicz, Elliott Larson, So Yoon Yoon and 2 more joined Meta-Analysis Resources
Mike Cheung replied to Mei Yi Ng's discussion 1 large pooled matrix or multiple smaller pooled matrices to test different models? in the group Meta-analytic structural equation modeling
"Hi Mei Yi, Both approaches sound reasonable. It is slightly more tricky to apply the first approach because you have to select the correspondent elements in the pooled correlation matrix and in the asymptotic sampling covariance matrix. It is…"
Peggy Kern posted a discussion

Different levels of analysis

Hi there, I was introduced to this network several years ago, so I'm not sure if it's still active, but will put a question out there anyway, as I appreciate any suggestions or help.My colleague and I are planning to conduct a meta-analysis of correlations using the Hunter and Schmidt method, correcting for attenuation.  We have found relevant correlations in some studies, but they are reported at different levels of analysis (We are interested in the individual level).  For example, while the…See More
Mei Yi Ng added a discussion to the group Meta-analytic structural equation modeling

1 large pooled matrix or multiple smaller pooled matrices to test different models?

Hi,There are a few different path analysis models that I want to test, each model may use some of the same variables and some different variables. For example, model 1 includes mediator A and outcome at pre and post-treatment, model 2 includes mediator B and outcome at pre and post-treatment, model 3 includes mediators A and B and outcome at pre, mid, and post-treatment. When I extracted data from each study, I extracted correlations and sample sizes for every measure at every timepoint…See More
Profile IconPeggy Kern and Ciara Keenan joined Meta-Analysis Resources
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Oct 25
Mike Cheung replied to Hamed Qahri Saremi's discussion Error code 6 for stage 1 random-effects TSSEM in metaSEM 0.9.6 in the group Meta-analytic structural equation modeling
"Dear Mei Yi, Could you email me the data and R code so that I can check it? Best,Mike"
Oct 22
Mei Yi Ng replied to Hamed Qahri Saremi's discussion Error code 6 for stage 1 random-effects TSSEM in metaSEM 0.9.6 in the group Meta-analytic structural equation modeling
"Dear Mike and other users, I am encountering the same problem. I have a smaller sample of 15 studies with a 5-variable matrix (1 binary variable, 4 continuous variables), but all 15 studies contribute data to every cell. Every study matrix is…"
Oct 22
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Oct 10
Guanglin Liu joined Mike Cheung's group

Meta-analytic structural equation modeling

A technique to synthesizing correlation/covariance matrices for the purpose of fitting structural equation models.
Oct 7
Guanglin Liu updated their profile
Oct 7
Profile IconGuanglin Liu and Shin, In-Soo joined Meta-Analysis Resources
Oct 7
Sue Duval joined Blair T. Johnson's group


Discussions highlight individuals or groups willing to consult on meta-analytic projects and/or who lead workshops and courses on the subject. Indicate substantive domains of application as well as to characterize their expertise.
Oct 3


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,

Started by Blair T. Johnson Jan 5, 2014.

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