placebo effect - definizione. Che cos'è placebo effect
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Cosa (chi) è placebo effect - definizione

SUBSTANCE OR TREATMENT OF NO THERAPEUTIC VALUE
Sugar pill; Placebos; Placebo Effect; Dummy Pill; Placebo response; Dummy drug; Placeboic; Placebo (origins of technical term); Uses of the term placebo; Placebo (medicine); Placebo (at funeral); Placebo effect; Plecibo; Cebocap; Meaning response; Placibo; Sham therapy; Sham treatment; Placebo studies; Fake pills
  • The "placebo effect" may be related to expectations, yet open-label studies prove it has effects.
  • Placebos are typically inert tablets, such as sugar pills.
  • Perkins Patent Tractors]]'' by [[James Gillray]], 1801. [[John Haygarth]] used this remedy to illustrate the power of the placebo effect.

placebo effect         
¦ noun a beneficial effect produced by a placebo drug or treatment, due to the patient's belief in that treatment.
placebo effect         
(placebo effects)
The placebo effect is the fact that some patients' health improves after taking what they believe is an effective drug but which is in fact only a placebo.
N-COUNT: usu the N in sing
placebo         
(placebos)
A placebo is a substance with no effects that a doctor gives to a patient instead of a drug. Placebos are used when testing new drugs or sometimes when a patient has imagined their illness.
N-COUNT

Wikipedia

Placebo

A placebo ( plə-SEE-boh) is a substance or treatment which is designed to have no therapeutic value. Common placebos include inert tablets (like sugar pills), inert injections (like saline), sham surgery, and other procedures.

In general, placebos can affect how patients perceive their condition and encourage the body's chemical processes for relieving pain and a few other symptoms, but have no impact on the disease itself. Improvements that patients experience after being treated with a placebo can also be due to unrelated factors, such as regression to the mean (a statistical effect where an unusually high or low measurement is likely to be followed by a less extreme one). The use of placebos in clinical medicine raises ethical concerns, especially if they are disguised as an active treatment, as this introduces dishonesty into the doctor–patient relationship and bypasses informed consent. While it was once assumed that this deception was necessary for placebos to have any effect, there is some evidence that placebos may have subjective effects even when the patient is aware that the treatment is a placebo (known as open-label placebo).

In drug testing and medical research, a placebo can be made to resemble an active medication or therapy so that it functions as a control; this is to prevent the recipient or others from knowing (with their consent) whether a treatment is active or inactive, as expectations about efficacy can influence results. In a placebo-controlled clinical trial any change in the control group is known as the placebo response, and the difference between this and the result of no treatment is the placebo effect. Some researchers now recommend comparing the experimental treatment with an existing treatment when possible, instead of a placebo.

The idea of a placebo effect—a therapeutic outcome derived from an inert treatment—was discussed in 18th century psychology, but became more prominent in the 20th century. An influential 1955 study entitled The Powerful Placebo firmly established the idea that placebo effects were clinically important, and were a result of the brain's role in physical health. A 1997 reassessment found no evidence of any placebo effect in the source data, as the study had not accounted for regression to the mean.

Esempi dal corpus di testo per placebo effect
1. Placebo effect on a cat "Homeopathy is another matter.
2. Call it the placebo effect, but it certainly made me feel better.
3. They found that homeopathy had no more than a placebo effect.
4. Which is not to knock them, because the placebo effect is very powerful.
5. There‘s no research to show there‘s any difference between it and the placebo effect.