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Placebo Effect

What is the Placebo Effect?

Placebo effect is a phenomenon in which certain substances are used to produce an “apparent” beneficial effect. The placebo can be saline, sterile water or a sugar pill.

placebo effect examples

The meaning of this treatment is unknown and therefore it is considered a “fake” treatment. However, in some cases, they tend to produce real answers.

The main role played in the placebo effect is patient expectation – the higher the expectation of the clinical activity, the greater the likelihood of showing a placebo response.

In this case, patients are unaware that the treatment they are receiving is actually a placebo. Instead, they believe they are being treated realistically.

A placebo is formulated in such a way that it can appear as a liquid, pill or injection as the actual treatment. A placebo is something in an inert state, different from the placebo effect. The placebo effect results from the administration of a drug that cannot be clinically proven.

Mechanism Of The Placebo Effect

The placebo effect is thought to be closely related to the expectations generated by self-fulfilling effects and expectations of feedback.

There are two main theories of control, namely – Classical Conditioning and Expectancy theory. In the classic setting, a stimulus and a placebo are used together to induce changes with the corresponding compound derived from the stimulus itself.

Updates have long-term effects and can affect the initial levels of processed information. The functional model of placebo-analgesic administration suggests that the relationship between brain activation and various other endogenous stimuli delivered by top-down mechanisms depends on the area of the human brain – the ‘forward’ area that produces and maintains expectations according to perception. .

Placebo Effect Examples

In one study, people were given a placebo and told it was a stimulant. After taking the pill, their pulse and blood pressure increased. The same pill was later given to people who said it helped them sleep. He then hypothesized the opposite effects.

Placebos can work by stimulating the release of endorphins, natural pain relievers, or they change a person’s perception of pain.

Placebo antidepressants have been studied for more than 12 weeks and have been shown to be effective.

In addition to these, the placebo showed positive effects on cough, erectile dysfunction, epilepsy and Parkinson’s disease.

Placebo Effect In Psychology Experiments

Placebo is a stable substance without psychological effects. Researchers use an experimental placebo group to identify placebos whose effects are compared with the results of independent real changes in the group for their effects on psychological and physiological factors that target brain function in well-being.


  • Placebo responses are influenced by expectations

  • They trigger the response of the hormones

  • Placebo are known to cause side effects

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