S
- Sabattier effect (solarization) (photographic processes) (science of photography)
- Sachs–Wolfe effect (astronomy) (physical cosmology)
- Sagnac effect (optics) (relativity)
- Samba effect (Brazil) (economy of Brazil) (history of Brazil)
- Sandbox effect (Internet technology) (search engine optimization)
- Scharnhorst effect (quantum field theory)
- Schottky effect (diodes)
- Screen-door effect (display technology) (technology)
- Second gas effect (anesthesia)
- Second-round effect (business) (monetary policy)
- Second-system effect (software development)
- Seeliger effect (astronomy) (observational astronomy)
- Serial position effect (cognitive biases) (psychological theories) (psychologicy)
- Shaft effect (motorcycle)
- Shapiro effect (effects of gravitation)
- Shielding effect (atomic, molecular, and optical physics) (atomic physics) (chemistry) (quantum chemistry)
- Shower-curtain effect (fluid dynamics)
- Shubnikov–de Haas effect (science)
- Side effect (computer science) (computer programming)
- Side effect (disambiguation)
- Signor–Lipps effect (extinction) (fossils) (paleontology)
- Silk screen effect (technology)
- Silo effect (management) (systems theory)
- Simon effect (psychology)
- Skin effect (electronics)
- Slashdot effect (denial-of-service attacks)(Internet terminology) (Slashdot)
- Sleeper effect (social psychology)
- Smith–Purcell effect (physics) (quantum optics)
- Snackwell effect (consumer behaviour) (psychology)
- Snob effect (consumer theory) (economics and finance)
- Snowball effect (language) (metaphors)
- Sound effect (film techniques) (sound effects) (sound production) (special effects)
- Southwest effect, The (airline terminology) (Southwest Airlines)
- Sow's ear effect (economics and finance) (economics effects)
- Spacing effect (cognitive biases) (educational psychology) (psychological theories)
- Special effect (animation) (special effects)
- Spin Hall effect (condensed matter physics) (Hall effect) (physics) (spintronics)
- Spoiler effect (psephology) (voting theory)
- Stark effect (atomic physics) (foundational quantum physics) (physical phenomena)
- Stars (shader effect) (3D computer graphics) (computer graphics) (demo effects)
- Status effect (video game gameplay)
- Stewart–Tolman effect (electrodynamics)
- Stock sound effect (film and video technology) (film and video terminology) (film terminology)
- Storage effect (demography) (population ecology)
- Stormtrooper effect (cartoon physics) (film criticism) (humor) (plot devices) (Star Wars fandom)
- Streisand effect (dynamic lists) (eponyms) (slang)
- Stroop effect (perception) (psychological tests)
- Subadditivity effect (cognitive biases)
- Subject-expectancy effect (cognitive biases)
- Sunyaev–Zel'dovich effect (physical cosmology) (radio astronomy)
- SVG filter effect (computer graphics) (computer graphics techniques) (image processing) (Scalable Vector Graphics)
- Sylvia Plath effect (psychology)
Read more about this topic: List Of Effects