Update June 2013: A systematic analysis of the topic has been published:Schönbrodt, F. D., & Perugini, M. (2013). At what sample size do correlations stabilize? Journal of Research in Personality, 47, 609-612. doi:10.1016/j.jrp.2013.05.009 Check ...

Update June 2013: A systematic analysis of the topic has been published:Schönbrodt, F. D., & Perugini, M. (2013). At what sample size do correlations stabilize? Journal of Research in Personality, 47, 609-612. doi:10.1016/j.jrp.2013.05.009 Check ...

“If you torture the data long enough, it will confess.” This aphorism, attributed to Ronald Coase, sometimes has been used in a disrespective manner, as if was wrong to do creative data analysis. This view obviously is misleading. In contra...

Sanjay Srivastava blogged some interesting thoughts about the process of post-publication peer review (PPPR), reflecting about his own comment on a PLOS ONE publication. I agree that open peer commentaries after publication are one important part of th...

Update Feb 17, 2014: WRS moved to Github – This installation procedure has been updated and still is valid Some users had trouble installing the WRS package from R-Forge. Here’s a method that should work automatically and fail-safe: [cc lan...

Maybe you have encountered this situation: you run a large-scale study over the internet, and out of curiosity, you frequently the correlation between two variables. My experience with this practice is usually frustrating, as in small sample sizes (a...

[Update June 12: Data.tables functions have been improved (thanks to a comment by Matthew Dowle); for a similar approach see also Tal Galili's post] The guys from RStudio now provide CRAN download logs (see also this blog post). Great work! I always as...

One critique frequently heard about Bayesian statistics is the subjectivity of the assumed prior distribution. If one is cherry-picking a prior, of course the posterior can be tweaked, especially when only few data points are at hand. For example, see ...

Today a new version (0.23.1) of the WRS package (Wilcox’ Robust Statistics) has been released. This package is the companion to his rather exhaustive book on robust statistics, “Introduction to Robust Estimation and Hypothesis Testing”...

The probably most frequent criticism of Bayesian statistics sounds something like “It’s all subjective – with the ‘right’ prior, you can get any result you want.”. In order to approach this criticism it has been sugg...