"Placebo drift," is an increase in placebo response rate over the years. This effect has been documented with the use of anti-depressants, where people respond more to the drugs than they did in the past, probably because they expect to be helped.
Placebo drift has been documented with the use of anti-depressants, where people respond more to the drugs than they did in the past, probably because they expect to be helped.
by UW66 March 15, 2010