Originally Posted by JadeEast
That's incorrect FMRI test have shown placebo reactions working in the brain with pain.
Ok, fMRI just shows the brain reacting to something, and the results of this technique should be taken with a grain of salt (think modern-day phrenology).
Anyway, to put this micro-debate to rest, there are not necessarily good biomarkers at our fingertips for psychological phenomena. This doesn't mean that the phenomena aren't biologically based, it's just that we haven't found a marker that tracks perfectly with the given phenomenon (in this case, placebo effect).
Here's a link to a podcast of the show Radiolab, this particular episode about the placebo effect:Radiolab