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.

Blair T. Johnson
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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…Continue

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

Started Jun 8

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…Continue

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

Started 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…Continue

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

Started this discussion. Last reply by Blair T. Johnson Jun 8.

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 Jan 5, 2014

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Ciara Keenan joined Blair T. Johnson's group
Jul 20
Blair T. Johnson's discussion was featured

Advice on sources 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 every subject. Therefore, make sure that it is worth conducting another one. If such a work has already been published, then why do another one? Possible reasons to do so include these possible factorsThe previous review(s) are out of date and there…See More
Jun 8
Blair T. Johnson posted a discussion

Advice on sources 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 every subject. Therefore, make sure that it is worth conducting another one. If such a work has already been published, then why do another one? Possible reasons to do so include these possible factorsThe previous review(s) are out of date and there…See More
Jun 8
Blair T. Johnson replied to Blair T. Johnson's discussion Role of methodological quality in meta-analysis
"The article is available here."
Jun 8
Blair T. Johnson replied to Kevria's discussion computing 95%CI of the I^2 statistic; and publication bias in the group Heterogeneity
"With 1), right I^2 can only be calculated when k>1. With 2), according to Higgins and Thompson's (2002) formulation, I^2 values below zero are rounded up to zero. With the second 2), it looks like a calculation error. With 3), for PET-PEESE,…"
May 9
Blair T. Johnson replied to Srikanth Parameswaran's discussion MASEM: "Cov" is not positive definite in the group Meta-analytic structural equation modeling
"Sorry about the delay in posting your submission! "
May 9
Blair T. Johnson replied to Mei Yi Ng's discussion NA in lower bound and upper bound of mediation effect in the group Meta-analytic structural equation modeling
"Sorry so slow in posting!"
May 9
Noha Ghallab 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
May 7
Tanya Hopwood joined Blair T. Johnson's group
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Software for Meta-Analysis

Discussions and resources focused on software to assist in conducting meta-analyses.
Mar 27
Tanya Hopwood 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.
Mar 27
Shu Jiang joined Blair T. Johnson's group
Feb 13
Guillermo Delgado-García joined Blair T. Johnson's group
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Reporting Standards

Standards of reporting meta-analyses (and potential overlaps with other reporting standards).
Feb 7
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Publication bias

Discussions concerning publication bias in meta-analysis.See More
Feb 7
Guillermo Delgado-García joined Blair T. Johnson's group
Feb 7
Guillermo Delgado-García joined Blair T. Johnson's group
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Scholarly Treatises on Meta-Analysis

Discussions and resources focused on scholarly works that address meta-analysis.
Feb 7
Guillermo Delgado-García joined Blair T. Johnson's group
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Science and Meta-Analysis

This group is meant for issues related to the place of meta-analytic studies in the larger endeavor of science.
Feb 7

Blair T. Johnson's Blog

Join Groups on this Site

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…

Continue

Posted 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 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 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 on September 20, 2012 at 3:30pm

Comment Wall (8 comments)

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At 4:53pm on April 28, 2012, Cynthia Symons said…

I guess it has been a long time! I'm up to my usual tricks--you know me. To tell you would take more time and space than I have here. We should keep in touch a little better. How are you?

At 3:47pm on July 16, 2011, Bill Gottdiener said…

Thanks, Blair! I'm delighted that you've set up this community. I hope you don't mind, but I want to connect some of my other colleagues/students.

 

Take care,

 

Bill

At 4:24am on July 16, 2011, Rasmi Kokash said…

Merci Blair, c'est tres gentil.

Bon WE.

Ras 

At 4:08pm on February 3, 2011, Natalie Dove said…

Is there a place to download either version of dstat? Looks like I'm back at my meta-analytic ways.

 

Great site! Nat

At 9:52am on November 30, 2010, Michelle Warren said…
: )
At 12:08pm on November 15, 2010, Seth M. Noar said…
Hi Blair-

Great site! I just learned about it this morning. All is well here.... just at that point in the semester when I'm swamped!

Seth :)
At 11:17am on May 17, 2010, Wolfgang Viechtbauer said…
Hi Blair,

I haven't had that much time to poke around, but this site looks like it could be a really useful resource for anybody who is conducting or about to start conducting meta-analyses. I'll do my best to add some information about meta-analysis software (and the metafor package) when I have some time.

Best,
Wolfgang
At 11:25am on March 21, 2010, Tania said…
Yeah! But it is a reality that meta-analysis has advanced a lot so that can be help us a lot to organize that growth and to make more efficient progress.
 
 
 

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