Bayesian estimation for two groups provides complete distributions of credible values for the effect size, group means and their difference, standard deviations and their difference, and the normality of the data. The method handles outliers. The decision rule can accept the null value (unlike traditional t tests) when certainty in the estimate is high (unlike Bayesian model comparison using Bayes factors). The method also yields precise estimates of statistical power for various research goals. The software and programs are free, and run on Macintosh, Linux, and Windows platforms. See this linked page for the latest paper and the software.
Search tag: BEST (for Bayesian estimation)
(This is the second revision of a the first version announced at a previous post.)
5 comments:
Thanks for your excellent work in making this so accessible! At line 67 of BESTexample.R I get one plot but also this message:
Error in file(filename, "r", encoding = encoding) :
cannot open the connection
In addition: Warning message:
In file(filename, "r", encoding = encoding) :
cannot open file 'plotPost.R': No such file or directory
I found plotPost.R over here http://www.indiana.edu/~kruschke/DoingBayesianDataAnalysis/Programs/plotPost.R and that made it all work fine.
It might be helpful to include a comment in the BESTexample.R about where to find this, or bundle it in with the zip file for completeness.
Yikes! Thank you for notifying me of this problem. I had simply zipped the wrong plotting file into the package. I have now deleted the wrong file and replaced it with the correct one, so I think that the zip file really is complete now. Thank you again!
I made an online version on the BEST routine. Maybe not to be used for serious analysis but quick n' easy!
Check it out at:
http://www.sumsar.net/best_online/
Galeri B: Thanks again for the great web app. Here's the blog post:
http://doingbayesiandataanalysis.blogspot.com/2013/01/bayesian-estimation-in-new-web-app.html
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