effect

• Drug effect, a change resulting from the administration of a drug
• Therapeutic effect, a beneficial change in medical condition, often caused by a drug
• Adverse effect or side effect, an unwanted change in medical condition caused by a drug

• Special effect, an artificial illusion
• Sound effect, an artificially created or enhanced sound
• Visual effects, artificially created or enhanced images
• Audio signal processing
• Effects unit, a device used to manipulate electronic sound
• Effects pedal, a small device attached to an instrument to modify its sound

• Effects, one's personal property or belongings
• Effects (G.I. Joe), a fictional character in the G.I. Joe universe
• Effects (film), a 1979 film (give a wide release in 2005)
• Effect size, a measure of the strength of a relationship between two variables
• Effect system, formal system which describes the computational effects of computer programs
• Pro-Design Effect, an Austrian paraglider design manufactured by Pro-Design

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• Affect (disambiguation)
• Effectiveness
• Efficacy
• Pragmatism, the philosophy of causes and effects

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