Effect

Effect may refer to:
 * A result or change of something


 * Effect of depression on mortality in heart disease
 * Effects on cognitive funtioning in mental health
 * Effect of placebo
 * Effects and aftermath of rape


 * Altitude effects
 * Decompression effects
 * Environmental effects
 * Framing effects
 * Framing (economics)
 * Framing (communication theory)
 * Framing (psychology)
 * Framing (social sciences)
 * Heat effects
 * Practice effects
 * Underwater effects


 * List of effects in psychology
 * Ceiling effect
 * Bezold effect
 * Experimenter effect
 * Forer effect
 * Hawthorne effect
 * Ideomotor effect
 * Levitin Effect
 * McGurk effect
 * McCollough effect
 * Overjustification effect
 * Positivity effect
 * Pygmalion effect
 * Recency effect
 * Tunnel effect
 * Westermarck effect


 * Cause and effect, an idiom describing causality

It may also refer to:
 * Effect size (statistical)
 * [[Effectiveness]
 * Cost effectiveness
 * Efficacy
 * Efficacy expectations

In medicine

 * Side effects (treatment)

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