To do this, I had to manually re-enter the studies’ information. At the end, I wanted to calculate several overall effects. In my meta-analysis, I have several different categories of outcomes, and I have a separate sheet for each outcome.
If anyone knows how to easily calculate these intervals, please let me know (email – Nevertheless, CMA does, however, provide 95% (and other %) confidence intervals. The non-response is unusual, as my other questions were answered within 24 hours. As of yet, the CMA support has yet to reply to my email. I evenĬontacted CMA support, and asked whether I was missing the output or if I could calculate the 80% credibility intervals easily with any provided This is unfortunate, as most authors report 80% credibility intervals in their articles. CMA does not provide 80% credibility intervals.So, for many people, this downside of CMA is a non-factor. Also, many authors have criticisms against individual correction method and prefer the artifactĭistribution method. CMA does, however, provide sample-size-weighted mean effects, which is a benefit. CMA does not do this, making it extremely difficult to apply the Using the individual correction method, it is necessary to adjust for sample sizes. So, if you know how to apply the artifact distribution method through hand-calculations, it is possible. Subsequently applying an artifact distribution method to correct for I will say, however, that the CMA output is somewhat friendly with So, for many people, CMA is not a viable program. The company did ensure that it was a feature that they were trying to develop, but I have no idea when they plan to implement this necessary feature. Verified that CMA cannot correct for unreliability. I-O Psychology) corrects for unreliability, which makes CMA very difficult to use for many researchers. Virtually every meta-analysis in my fields (Business/ I was extremely surprised by thisĭiscovery. Now, I see these analyses everywhere, and many journals seem them as a must-have for meta-analytic results. To be honest, before using the program, I was not knowledgeable about many of the included methods, and I only found out about them after looking through the menus and manuals. Once again, this feature was extremely helpful to me. In addition to these, I am sure that it can calculate many other sample bias statistics, but these three are the primary ones that I use. It can also calculate the fail-safe n, and it can apply a trim-and-fill method using a random as well as fixed effects model. It can create many different types of funnel plots (cool!). CMA provides many sample bias statistics.Otherwise, I would spend weeks (months?) figuring out the formula for transforming p-values into d-values, and so on. This feature of the program is extremely helpful, and was a must-have for my study. Transform group differences into correlations. Maybe even more importantly, it can transform these effect sizes into many different other types of effect sizes, such as (in my case) Cohen’s d or Hedge’s g, and it can even As you can tell, the program and handle A LOT of different types of information, and it can automatically transform them into a common effect size. P-values, paired-group pre- and post-test means and standard deviations, F-scores, t-values, two-group post-test means and p-values, two-group mean changes and standard deviation of changes, intendent group means and p-values, and paired-group F-scores. In my meta-analysis alone, I include studies which report two-group pre- and post-test means and standard deviations, two-group post-test means and standard deviations, Cohen’s ds, frequencies, independent group CMA can interpret almost any type of statistical input possible.So, I thought I’d include them on my website for future The first two are good features, while the last five are not-so-good. The program is actually very good, and it can perform most of the analyses that I need however, there are seven things that I wish I knew about the program before buying it. So, I decided the purchase the program, CMA, hoping that it would solve all my meta-analysis woes. In some cases, the authors only report the p-values and nothing else! Further yet, many of the studies that I am analyzing do not report all aspects of the effects of interest.
Comprehensive Meta-Analysis (CMA) program to help with a particularly tricky meta-analysis that I amĭifferences that are often calculated through t-test and mixed ANOVAs, and many free meta-analysis programs and scripts cannot interpret these effects.