From Nicholas Humphrey
I’d like to respond to your report on the creation of a mathematical model that supports my evolutionary psychology theory of the placebo effect (8 September, p 9). I welcome this development, but it just formalises a logically strong argument I put forward 10 years ago, supported by a wealth of facts.
In the story you refer to me as a retired psychologist. I am no more a retired psychologist than Stephen Hawking is a retired cosmologist. I am as active as ever, and I have a about the evolution of healing in the journal Current Biology (the paper can also be found on my website, ).
Cambridge, UK
