jake...thanks for the link.
I couldn't get into the details as one has to register, but the conclusions that I gathered from the abstract was that the results were inconclusive and the release of Dopamine MIGHT in part explain the placebo effect.
I have no argument with those results....although I have never seen how the trial was set up, but the point is, that one group did not know what they were having and this invoked the placebo effect.
In the case of the copper ring against drugs, BOTH groups knew what they were taking, invalidating the placebo effect. i.e....they were told that copper rings worked for some and hence were prejudiced.
Now if one wanted to see the effects of the placebo effect, one group would be given the copper bracelet and the others given pills containing no active ingredient.
Now if the copper bracelet group did better, then we are in business, but I have never seen such a scientific trial.
If you have, could you please give me the link.