Submitting to an MRI scan appears to reduce depression, according to a recent study. Studies of the phenomenon can't discern whether the change is the result of the machine's electric fields, a placebo effect or perhaps a statistical fluke.
This article was originally published with the title "Claims & Caveats" in SA Mind 23, 2, 14 (May 2012)
doi:10.1038/scientificamericanmind0512-14a