Maybe it's an example of the Hawthorne Effect: http://en.wikipedia.org/wiki/Hawthorne_effect http://en.wikipedia.org/wiki/Hawthorne_effect Unfortunately, ther

Maybe it's an example of the Hawthorne Effect: http://en.wikipedia.org/wiki/Hawthorne_effect http://en.wikipedia.org/wiki/Hawthorne_effect Unfortunately, there probably isn't an ethical way to subject people to medical testing without their knowledge.