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

Aslesha Sumbe is now a member of Meta-Analysis Resources
Tuesday
Stephane De Brito added a discussion to the group Calculating Effect Sizes and Their Variances or Standard Errors
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Dealing with effect sizes from 1 study reporting both group comparison and correlations?

Hi,We are running a meta-analysis looking at the association between psychopathy and impulsivity and some studies report both group comparisons (psychopaths vs non-psychopaths) and correlations between psychopathy scores and impulsivity.What do you do in those instances? Do you calculate the two effect sizes (i.e., from the group comparison and from the correlation) and average them to obtain an overall effect size? What would you recommend when the correlation is run across the two groups or…See More
Saturday
Mia Harness is now a member of Meta-Analysis Resources
Saturday
Sergio Canavati 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.
Nov 2
Sergio Canavati is now a member of Meta-Analysis Resources
Nov 2
Hardinz51 is now a member of Meta-Analysis Resources
Oct 25
Deborah Caldwell is now a member of Meta-Analysis Resources
Oct 10
Stephane De Brito joined Blair T. Johnson's group
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Calculating Effect Sizes and Their Variances or Standard Errors

Tips and techniques to help meta-analysts calculate effect sizes and the variances that are needed for the purpose of analysis.See More
Oct 10
Jisoo Ock replied to Ryan Tang's discussion Formative Model with TSSEM in the group Meta-analytic structural equation modeling
"Thank you, Dr. Cheung!  I will try to translate it into RAM formulation and post it here, in case anyone else might find it useful.   Best, Jisoo "
Oct 7
Mike Cheung replied to Ryan Tang's discussion Formative Model with TSSEM in the group Meta-analytic structural equation modeling
"Dear Jisoo, The "<~" operator is only defined in lavaan. The lavaan2RAM() function does not know how to translate it into the RAM formulation. I have not implemented it yet as I don't use formative models. I will try to look at it…"
Oct 7
saneesh edacherian replied to saneesh edacherian's discussion Saturation model as TSSEM 2 output in the group Meta-analytic structural equation modeling
"Thank you, Dr. Mike. I am new to SEM.  I am testing a single mediator. X-M-Y. So I thought I can run the models (1) Without mediator (X-Y) (2) model with both direct and indirect effects (3) with just the indirect effect (X-M-Y) I found the…"
Oct 5
Jisoo Ock replied to Ryan Tang's discussion Formative Model with TSSEM in the group Meta-analytic structural equation modeling
"Dear Dr. Cheung,   Following up on Ryan's question, how should the RAM be specified in order to fit formative models?   Using the Digman97 dataset as an example (with lavaan2RAM syntax), if we were interested in fitting a…"
Oct 5
Jisoo Ock 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.
Oct 5
Mike Cheung replied to Empi's discussion standardized slopes in meta-analysis vs. multigroup SEM? in the group Meta-analytic structural equation modeling
"Dear Empi, One answer is the meta-analysis and SEM are two different fields with different assumptions. SEM assumes that you are testing your own study whereas meta-analysis is based on the assumption that various researchers independently conduct…"
Oct 4
Mike Cheung replied to Mei Yi Ng's discussion Comparing indirect effects between clusters in the group Meta-analytic structural equation modeling
"Readers interested in this topic may refer to the following discussion https://openmx.ssri.psu.edu/node/4410"
Oct 4
Mike Cheung replied to saneesh edacherian's discussion Saturation model as TSSEM 2 output in the group Meta-analytic structural equation modeling
"Dear Saneesh, If your proposed model is just-identified, the df is always 0. This is exactly the same as standard applications in SEM. You may refer to the SEM textbooks for more details. Regards,Mike"
Oct 4

Forum

Best starting points for systematic reviews and meta-analysis

A colleague asked for advice about writing a systematic review, for a team that had never written one before. Below is a refined version of my advice.First, note that these days there is a systematic review or meta-analysis available on practically…Continue

Tags: small-studies, bias, effects, reporting, standards

Started by Blair T. Johnson Jun 8, 2017.

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 Jun 8, 2017.

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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