---
title: "List of effects"
chunk: 3/4
source: "https://en.wikipedia.org/wiki/List_of_effects"
category: "reference"
tags: "science, encyclopedia"
date_saved: "2026-05-05T03:50:48.360559+00:00"
instance: "kb-cron"
---

== M ==
Magali effect
Magneto-optic effect (electric and magnetic fields in matter) (optical phenomena)
Magneto-optic Kerr effect (condensed matter physics) (electric and magnetic fields in matter) (optical phenomena)
magnetocaloric effect (physical phenomena) (electric and magnetic fields in matter) (thermodynamics)
Magnus effect (fluid dynamics)
Malmquist effect (astronomy)
Malter effect (physics)
Mandela effect (psychology) (paranormal)
Marangoni effect (fluid dynamics) (fluid mechanics) (physical phenomena)
Marchywka effect (electrochemistry) (ultraviolet sensor production)
Mark Twain effect (economics and finance) (stock market)
Martha Mitchell effect (psychological theories) (psychosis)
Massenerhebung effect (trees)
Maternal age effect (developmental biology)
Maternal effect (developmental biology)
Matthew effect (education) (education)
Matilda effect (Research)
Matthew effect (sociology) (adages) (social phenomena) (sociology of scientific knowledge)
McClintock effect (menstruation)
McCollough effect (optical illusions)
McGurk effect (auditory illusions) (perception) (psychological theories)
Meissner effect (levitation) (magnetism) (superconductivity)
Meitner–Hupfeld effect (particle physics)
Mellanby effect (health) (alcohol intoxication)
Memory effect (electric batteries)
Mesomeric effect (chemical bonding)
Microwave auditory effect (cognitive neuroscience) (espionage) (hearing) (human psychology) (less-lethal weapons) (mind control) (sound)
Mid-domain effect (macroecology) (biogeography) (biodiversity)
Mikheyev–Smirnov–Wolfenstein effect (particle physics)
Milky seas effect (aquatic biology) (biological oceanography) (bioluminescence)
Miller effect (electrical engineering) (electronics terms)
Miniature effect (film and video technology) (film techniques) (scale modeling) (scientific modeling) (special effects) (visual effects)
Misinformation effect (cognitive biases) (psychological theories)
Missing letter effect (perception) (psychometrics)
Misnay–Schardin effect (explosives)
Mohring effect (microeconomics) (transportation)
Mössbauer effect (condensed matter physics) (nuclear physics) (physical phenomena)
Mozart effect (education psychology) (popular psychology) (psychological theories) (Wolfgang Amadeus Mozart)
Mpemba effect (phase changes) (physical paradoxes) (thermodynamics)
Mullins effect (rubber properties)
Multiple-effect humidification (drinking water) (water supply) (water treatment)
Munroe effect (explosive weapons) (explosives)

== N ==
Name-letter effect (psychology)
Negative (positive) contrast effect (psychology)
Negativity effect (cognitive biases) (psychological theories)
Neglected firm effect (business analysis)
Nernst effect (electrodynamics) (thermodynamics)
Network effect (business models) (economics effects) (information technology) (monopoly [economics]) (networks) (transport economics)
Non-thermal microwave effect (chemical kinetics)
Nordtvedt effect (astronomy) (astrophysics) (effects of gravitation) (relativity) (theoretical physics)
Novaya Zemlya effect (arctic) (atmospheric optical phenomena) (atmospheric science) (Novaya Zemlya) (solar phenomena)
Novelty effect (learning) (psychology)
Nuclear Overhauser effect (chemical physics) (nuclear magnetic resonance) (physical chemistry) (spectroscopy)
Numerosity adaptation effect (cognitive science) (optical illusions) (perception)
Nut Island effect (human resource management) (organizational studies and human resource management)

== O ==
Oberth effect (physics)
Observer effect (information technology) (computer programming)
Observer effect (physics) (physics)
Observer-expectancy effect (cognitive biases) (cognitive psychology)
Occlusion effect (biology) (otology)
Octave effect (effects units)
Okorokov effect (physics)
Oligodynamic effect (biology and pharmacology of chemical elements)
Online disinhibition effect (Internet culture) (psychology)
Onnes effect (condensed matter physics) (fluid mechanics) (helium)
Opposition effect (astronomy) (optical phenomena) (observational astronomy) (radiometry) (scattering, absorption and radiative transfer [optics])
Osborne effect (marketing)
Ostrich effect (adages)
Ouzo effect (Colloidal chemistry) (Chemical mixtures) (Condensed matter physics) (Soft matter) (Fluid dynamics)
Overconfidence effect (cognitive biases) (psychological theories)
Overjustification effect (educational psychology) (psychological theories) (psychology)
Overview effect (spaceflight) (transcendence) (psychology)
Ovsiankina effect (psychology)

== P ==
Pandemonium effect (gamma spectroscopy)
Partner effects (economics) (sociology)
Paschen–Back effect (atomic physics) (atomic, molecular, and optical physics) (magnetism)
Pasteur effect (beer and brewery) (biochemistry) (fermentation) (metabolism)
Paternal effect – (developmental biology)
Pauli effect (experimental physics) (parapsychology) (psychokinesis)
Payne effect (rubber properties)
Pearson–Anson effect (electronics)
Peltier–Seebeck effect (thermoelectric effect) (electricity) (HVAC) (physical phenomena) (thermodynamics)
Peltzman effect (economics of regulation) (University of Chicago)
Penn effect (economics effects)
Petkau effect (radiobiology)
Phaser (effect) (audio effects) (effects units)
Phillips effect (employment) (inflation)
Photoacoustic Doppler effect (Doppler effects) (radar signal processing) (radio frequency propagation) (wave mechanics)
Photoelectric effect (Albert Einstein) (electrical phenomena) (foundational quantum physics)
Photorefractive effect (nonlinear optics)
Photothermal effect (particle physics) (photochemistry) (physics)
Picture superiority effect (cognitive biases) (educational psychology) (memory biases) (psychological theories)
Piezoresistive effect (electrical phenomena)
Pigou effect (economics effects)
Pioneer effect (astrodynamics) (pioneer program)
Placebo effect (bioethics) (clinical research) (experimental design) (history of medicine) (Latin medical phrases) (Latin words and phrases) (medical ethics) (medical terms) (medicinal chemistry) (mind–body interventions) (pharmacology) (psychological theories) (research methods) (theories)
Plasma effect (demo effects)
Plateau effect (systems science) (metaphors referring to places)
Plummer effect (iodine) (medicine)
Pockels effect (cryptography) (nonlinear optics) (polarization)
Polar effect (physical organic chemistry)
Polar effect (genetics) (genetics)
Portevin–Le Chatelier effect (engineering) (materials science)
Position-effect variegation (genetics)
Positivity effect (aging) (cognition) (cognitive biases) (memory) (memory biases) (psychological theories) (psychology)
Poynting effect (gases)
Poynting–Robertson effect (celestial mechanics)
Practical effect (special effects)
Pratfall effect (psychology)
Precedence effect (acoustics) (sound perception)
Primakoff effect (particle physics)
Priority effect (ecology)
Probe effect (software development philosophies) (system administration)
Proteus effect (consciousness) (psychology)
Proximity effect (atomic physics) (nuclear physics) (physics)
Proximity effect (audio) (acoustics)
Proximity effect (electromagnetism) (electrical engineering)
Proximity effect (electron beam lithography) (condensed matter physics)
Proximity effect (superconductivity) (superconductivity)
Pseudocertainty effect
Pulfrich effect (3D imaging) (optical illusions)
Purkinje effect (optical illusions) (perception) (vision)
Pygmalion effect (cognitive biases)

== Q ==
QMR effect (electric and magnetic fields in matter) (magnetism) (optics) (optical phenomena)
Quantum-confined Stark effect (quantum mechanics)
Quantum Hall effect (Hall effect) (condensed matter physics) (quantum electronics) (spintronics)
Quantum Zeno effect (quantum measurement)

== R ==
Raman effect (physics)
Ramp effect (drug addiction) (drug rehabilitation)
Ramsauer–Townsend effect (physical phenomena) (scattering)
Ransom note effect (typography)
Rashomon effect (psychology)
Ratchet effect (game theory)
Rear projection effect (special effects)
Rebound effect (medical sign)
Rebound effect (conservation) (economics paradoxes) (energy) (energy conservation)
Red-eye effect (science of photography)
Relativistic Doppler effect (Doppler effects) (special relativity)
Renner–Teller effect (molecular physics)
Reverse Cerenkov effect (physics)
Reverse short-channel effect (transistors)
Ringelmann effect (social psychology)
Ripple effect (education) (sociology)
Robin Hood effect (income distribution) (Robin Hood) (socioeconomics) (taxation)
Roe effect (abortion debate) (abortion in the United States)
Root effect (fish) (hemoproteins) (respiratory physiology)
Rope trick effect (nuclear weapons)
Rossiter–McLaughlin effect (Doppler effects) (extrasolar planets) (spectroscopy) (star systems)
Rusty bolt effect (radio electronics)
Russ Christ effect (PV rejection profile)