Intentionality expanded to include HRV, stress reduction, and the power of nature:
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2872309/
http://www.youaretheplacebo.com/
http://www.ibtimes.com/facebook-users-can-manipulate-own-emotions.
Apparently my favorite cartoonist caught the bug too: http://xkcd.com/1620/
But wait, there is more...
..http://www.ncbi.nlm.nih.gov/pubmed/11021339
http://www.forbes.com/the-feel-good-switch-the-radical-future-of-emotion/
http://www.chipdesignmag.com/human-intentions-affect-electronics/
Further reading for the curious:
https://en.wikipedia.org/wiki/Action_at_a_distancehttps://en.wikipedia.org/wiki/Quantum_entanglement