Effect may refer to:

  • A result or change of something
    • List of effects
    • Cause and effect, an idiom describing causality

In pharmacy and pharmacology:

  • 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
  • Dose-response effect, the relationship between a drug dose and its effect, plotted on a dose-response curve

In media:

  • 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 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

Amendments to the constitution of the United States: (Bill of Rights) Amendment IV "The right of the people to be secure in their persons, house, papers, and effects...

Other articles related to "effect":

Dolly Zoom
... The dolly zoom is an unsettling in-camera effect that appears to undermine normal visual perception ... The effect is achieved by using the setting of a zoom lens to adjust the angle of view (often referred to as field of view or FOV) while the camera dollies (or moves) towards or ... sizes of objects, seeing a perspective change without a size change is a highly unsettling effect, and the emotional impact of this effect is greater than the description above can suggest ...
Splash Damage
... Splash damage is distinguished from area of effect damage in that typically splash damage deals increased damage to the target at the center of impact and decreased damage (splash ... must be centered around a target, whereas area of effect spells may be used anywhere ... not universal, though in most MMORPGs, the term area of effect (AoE or AE) is far more commonly used ...
Urban Archaeology
... The effect of this is that even a moderately sized settlement of any antiquity is built on top of a heap of refuse and demolished buildings and is therefore raised up from its original height on a plateau of ... In walled towns such as those in medieval Europe the effect of the encircling defences was to hold in the waste so that it could not slip outwards ...
Dolly Zoom - Purpose of The Effect
... After Hitchcock popularized the effect (he used it again for a climactic revelation in Marnie), the technique was used by many other filmmakers, and eventually became regarded as a gimmick or cliché ... This was especially true after director Steven Spielberg repopularized the effect in his highly regarded film Jaws, in a memorable shot of a dolly zoom into Police Chief Brody's (Roy Scheider) stunned ...
Sulfate - Environmental Effects - Main Effects On Climate
... The main direct effect of sulfates on the climate involves the scattering of light, effectively increasing the Earth's albedo ... This effect is moderately well understood and leads to a cooling from the negative radiative forcing of about 0.5 W/m2 relative to pre-industrial values, partially offsetting the larger ... The effect is strongly spatially non-uniform, being largest downstream of large industrial areas ...

Famous quotes containing the word effect:

    Power is poison. Its effect on Presidents had always been tragic.
    Henry Brooks Adams (1838–1918)

    I have witnessed, and greatly enjoyed, the first act of everything which Wagner created, but the effect on me has always been so powerful that one act was quite sufficient; whenever I have witnessed two acts I have gone away physically exhausted; and whenever I have ventured an entire opera the result has been the next thing to suicide.
    Mark Twain [Samuel Langhorne Clemens] (1835–1910)

    Movies are one of the bad habits that corrupted our century. Of their many sins, I offer as the worst their effect on the intellectual side of the nation. It is chiefly from that viewpoint I write of them—as an eruption of trash that has lamed the American mind and retarded Americans from becoming a cultured people.
    Ben Hecht (1893–1964)