Arthritis pain reduced by optical illusion?

This very interesting study correlates well with other research that shows that positive visualization and guided imagery can also help with reduction of pain from physical sources. It speaks to the power of our minds in processing pain sensations, and how it can be harnessed to reduce pain.

http://www.thirdage.com/news/optical-illusions-found-to-ease-arthritis-pain_04-19-2011?page=1