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

Nina Lasek 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.
Tuesday
Nina Lasek is now a member of Meta-Analysis Resources
Tuesday
Empi commented on Mike Cheung's group Meta-analytic structural equation modeling
"Thank you for your reply - I'll definitely learn R, best Empi"
May 18
saneesh edacherian 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.
May 14
Mike Cheung commented on Mike Cheung's group Meta-analytic structural equation modeling
"Dear Empi, There is no grouping variable because the data are summary statistics (correlation matrices). test.cov may include the stacked correlation matrices, e.g., 1 .2 1 .3 .4 1 1 .3 1 .4 .5 1 The sample sizes are specified by NOBSERVATIONS = 100…"
May 13
Empi commented on Mike Cheung's group Meta-analytic structural equation modeling
"Dear Mike et al.,   this post http://www.statmodel.com/discussion/messages/11/3993.html shows how to use Mplus for pooling correlation matrices.   However, I wonder why there is no need to indicate the sample/group the original data refer…"
May 13
Mike Cheung replied to Empi's discussion MASEM for individual-level survey data? in the group Meta-analytic structural equation modeling
"Dear Empi, I did not suggest conducting a meta-analysis with the multiple-group analysis though it is possible. You mentioned that you have the raw data. That's why I suggested that there are several possible ways to analyze the data including…"
May 10
Empi replied to Empi's discussion MASEM for individual-level survey data? in the group Meta-analytic structural equation modeling
"Dear Mike, can you recommend any illustrative examples for multigroup SEM using samples with different measures to conduct a meta-analysis? Background for this question: as far as I can see, multigoup SEM is typically used to compare some quantity…"
May 10
Mike Cheung replied to Empi's discussion MASEM for individual-level survey data? in the group Meta-analytic structural equation modeling
"Hi Empi, The WLS estimation in Mplus is meant for covariance matrices. It will not work for correlation matrices which are usually required for MASEM. Best,Mike"
May 2
Empi replied to Empi's discussion MASEM for individual-level survey data? in the group Meta-analytic structural equation modeling
"Dear Mike, many thanks for your prompt reply; I am still reading your article(s) on MASEM but wonder if andhow Mplus might be used to construct an appropriate covariance/correlation matrix for MASEM. Statmodell.com contains this message…"
May 1
Mrs. Cherish Herman. is now a member of Meta-Analysis Resources
Apr 30
Mike Cheung replied to Empi's discussion MASEM for individual-level survey data? in the group Meta-analytic structural equation modeling
"Dear Empi, Since you have the raw data, there are several options for you. You may either conduct a multilevel or multiple-group structural equation modeling (see Mplus's manual). Alternatively, you may run either a correlation- or…"
Apr 28
Empi added a discussion to the group Meta-analytic structural equation modeling
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MASEM for individual-level survey data?

Dear group members,I am rather unexperienced using meta-analytical techniques and thus hope to find some advice here.The setting: Using Mplus, I estimated a simple mediation model with observed indicators across 7 independent survey datasets. Sample sizes of the surveys are roughly comparable (n = 1000 per study), and so are the 3 regression coefficients for each of the seven models in terms of their sign and significance. However, the magnitude of the regression coefficients differs between…See More
Apr 28
Empi 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.
Apr 28
Empi is now a member of Meta-Analysis Resources
Apr 28
Linda Lidborg is now a member of Meta-Analysis Resources
Apr 23

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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