plural of practical effect

The phenomenon that, as social conditions and opportunities improve, social frustration grows more quickly.

The phenomenon whereby it is more difficult to detect local feature changes in an upside-down face, despite identical changes being obvious in an upright face.

plural of avalanche effect

(cinematography) A sound effect representing a single discrete event, such as breaking glass, as opposed to ongoing background sounds.

plural of spot effect

An optical illusion whereby, when a person fixes the gaze on a particular point, an unchanging stimulus away from the fixation point appears to fade away and disappear.

plural of Compton effect

The phenomenon of a fire rushing quickly up an inclined surface, due to a combination of the Coandă effect (which causes the fire to hug the inclined surface) and flashover (where the surface of a space near the fire — in this case the surface of the more elevated regions of the incline — is heated until it self-ignites).

The phenomenon whereby humans localize sound sources in the direction of the first arriving sound, even in the presence of a single reflection from a different direction.