On this week's show we also hear about new research into the placebo and nocebo effects, and from IgNobel master of ceremonies Marc Abrahams on why great science can be both funny and profound
Penny Sarchet discusses research on the 'nocebo' effect in her winning essay for the Wellcome Trust science writing prize, awarded in association with the Guardian and Observer
Andrew Brown: Placebos work because people believe in them. So what do we make of a study that shows they work even when patients are told they are sugar pills?