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MENTAL MODEL · M3140

Placebo Effect

Placebo Effect
BehaviorHigh supportPsychology
Included
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Version 1.0.0 · Updated 2026-07-30

CORE DEFINITION

The phenomenon in which a patient experiences real physiological or psychological improvement after receiving an ineffective treatment (such as a sugar pill) due to the belief that the treatment is effective. This effect can produce actual physiological changes, such as pain relief and decreased blood pressure.

SCAFFOLDING EFFECT

psychology

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Mind-body connection. It reminds us that beliefs and expectations can produce real physiological effects. In product design and management incentives, understanding this effect helps create positive psychological cues, enhancing user experience or employee performance.

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The placebo effect arises from conditioned reflexes and expectation: when patients believe a treatment is effective, the brain releases neurochemicals such as endorphins and dopamine, producing genuine analgesia and mood improvement. Double-blind randomized controlled trials are designed to exclude such belief-induced improvements to isolate the true efficacy of the drug itself.

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Source support: Explicit

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