Online Mind Mapping and Brainstorming

Create your own awesome maps

Online Mind Mapping and Brainstorming

Even on the go

with our free apps for iPhone, iPad and Android

Get Started

Already have an account? Log In

Placebo Effect by Mind Map: Placebo Effect
5.0 stars - 1 reviews range from 0 to 5

Placebo Effect


The treatment effect measured in the placebo arm of a clinical trial, which includes those subjects who have received a fake or inert treatment. If a trial is rigorously designed, placebo effects should include everything other than a physiological response to a biologically active treatment. Therefore, we can subtract placebo-effect findings from the treatment group, who will display treatment effects plus placebo effects, and we are left with a measurement of the treatment effect alone.

illusions of observation

regression to the mean

a statistical phenomenon that includes extreme symptoms becoming less extreme as a matter of course. For any variable symptom, periods of time when symptoms are at their worst are likely, by chance alone, to be followed by a return to more average symptoms.

self-limiting conditions


of observers

of subjects

countered by


subjects associate a treatment ritual with feeling better

Hawthorne effect

the very fact of being observed in a clinical trial results in a change in behavior and reporting (McCarney et al. 2007)

trial effects

subjects more likely to:


the ritual of treatment

if treatment involves

Believing one is being treated may reduce

Hands-on treatments

based on

The Poor, Misunderstood Placebo

by Steven Novella

Skeptical Inquirer