placebo effect

placebo effect
first few minutes of this explains the placebo effect nicely:
http://www.youtube.com/watch?v=ZKq2udn37j0

a slightly more sterile presentation:
http://www.youtube.com/watch?v=udJ31KKXBKk&feature=related

6 minute video about placebo knee surgeries:
http://sciencestage.com/v/11940/the-placebo-effect-knee-surgery.html

article about the increasing "effectiveness" of placebos:
http://www.wired.com/medtech/drugs/magazine/17-09/ff_placebo_effect?currentPage=all

more video (27 minutes):
http://video.google.co.uk/videoplay?docid=4115610193400691959#

and continuing (24 minutes):
http://video.google.co.uk/videoplay?docid=-6942125248944933588&hl=en&emb=1#

and more...