Figure 5 | Scientific Reports

Figure 5

From: Differential power of placebo across major psychiatric disorders: a preliminary meta-analysis and machine learning study

Figure 5

The additive model of placebo effect. The observed treatment effect includes the observed placebo effect, while the observed placebo effect includes independent effect (e.g., spontaneous improvement and natural course of the disease). In an additive model, the true treatment effect is the observed treatment effect subtracting the true placebo effect and the independent effect, and the true placebo effect is the observed placebo effect subtracting the independent effect.

Back to article page