widespread statistical error
http://www.badscience.net/2011/10/what-if-academics-were-as-dumb-as-quacks-with-statistics/ +
http://www.nature.com/neuro/journal/v14/n9/full/nn.2886.html
QT:
“Sander Nieuwenhuis and colleagues … identified one direct, stark statistical error that is so widespread it appears in about half of all the published papers surveyed from the academic neuroscience research literature.”
“When making a comparison between two effects, researchers should report the statistical significance of their difference rather than the difference between their significance levels.”
This tends to reduce the amount of significance !