Previous Experience and Analgesia

Previous experience can also influence the magnitude of placebo analgesia. In one study, the intensity of painful stimulation was reduced surreptitiously after placebo administration, so leading subjects to believe that an analgesic treatment was effective (Colloca and Benedetti, 2006) (Fig. 4.2C). Fig. 4.2 C. Variability in magnitude of placebo analgesia. Part (C) shows different degrees …