A temporal perceptual illusion that can arise when observers judge the elapsed time between sensory stimuli applied sequentially at different locations. Subjects tend to overestimate the time between stimuli when the distance between the stimuli is large, and to underestimate the time when the distance is small.

plural of kappa effect

A spatial perceptual illusion that arises when observers judge the distance between consecutive stimuli in a sequence. When the distance between stimuli is constant but the time between stimuli is not, subjects tend to misperceive the shorter temporal interval as being accompanied by a shorter spatial interval.

A counterintuitive physical phenomenon observed with a chain of beads placed inside a jar: when one end of the chain is yanked from the jar and allowed to fall to the floor, it establishes a self-sustaining flow of the chain which rises up into an arch as if being sucked by an invisible siphon.

plural of stack effect

plural of chimney effect

Synonym of stack effect

The phenomenon of air buoyancy leading to the movement of air into and out of buildings, chimneys, etc., which may drive natural ventilation, air infiltration, and fires.

Synonym of Brunswick green

plural of English green