Rotating image of human brain, illustrating the lateral sulcus in the brain. The term sulcus (pl. sulci) is a general descriptive term for a furrow or fissure.
Halo may refer to: 1  Halo (religious iconography), a glow or ring of light around a head or person in art. 2  Halo (series), video game franchise.
A halo effect is an outcome in one area due to factors derived from another. When good-looking people, for example, are perceived as more intelligent, more successful and more popular, that's the halo effect in psychology and it's caused by a cognitive bias, the tendency for an impression created in one area to influence opinion in another area.