Effect may refer to:
* A
result or change of something
**
List of effects
** Cause and effect, an idiom describing
causality
Causality (also referred to as causation, or cause and effect) is influence by which one event, process, state, or object (''a'' ''cause'') contributes to the production of another event, process, state, or object (an ''effect'') where the cau ...
Pharmacy and pharmacology
*
Drug effect
Efficacy is the ability to perform a task to a satisfactory or expected degree. The word comes from the same roots as ''effectiveness'', and it has often been used synonymously, although in pharmacology a distinction is now often made between ...
, 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
In media
*
Special effect
Special effects (often abbreviated as SFX, F/X or simply FX) are illusions or visual tricks used in the theatre, film, television, video game, amusement park and simulator industries to simulate the imagined events in a story or virtual wor ...
, 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
Other uses
* Effects, one's
personal property
property is property that is movable. In common law systems, personal property may also be called chattels or personalty. In civil law systems, personal property is often called movable property or movables—any property that can be moved fr ...
or belongings
*
Effects (G.I. Joe), a fictional character in the G.I. Joe universe
*
''Effects'' (film), a 2005 film
*
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
See also
*
*
*
Affect (disambiguation)
*
Effectiveness
*
Efficacy
Efficacy is the ability to perform a task to a satisfactory or expected degree. The word comes from the same roots as ''effectiveness'', and it has often been used synonymously, although in pharmacology a pragmatic clinical trial#Efficacy versu ...
*
Pragmatism, the philosophy of causes and effects
*
Sequence of events
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