Thursday, September 17, 2009

Salmon and voodoo

If you follow any neuroscience/psychology blog, chances are you already heard of the « puzzingly high correlations in fMRI studies of emotion, personality, and social cognition » paper (ex-voodoo correlation). If you haven't, start with this summary of the debate by the neurocritic and follow the links. On one level, the discussion revolves around the statistical analyses used in some fMRI studies in social neuroscience. It's pretty technical but there is a lot to learn even if you are not into neuroimaging. On another level, the diffusion of the paper on the web and the ensuing discussion on various blogs sparked a debate on peer review and scientific debate. Plenty of food for thought there as well.

Anyway, I just discovered (via the neuroskeptic), that Craig Bennett (of Prefrontal.org) recently presented a poster illustrating how improper statistical analysis can lead to spurious detection of BOLD changes in a dead salmon. This really drives the point home cunningly.

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