The __________ illusion leads us to perceive two lines of identical length as different when they end in a set of arrowheads pointing inward versus outward.

Question

Quizplus · Accepted Answer

The Müller-Lyer illusion involves two lines of identical length, but with different sets of arrowheads at either end. One set of arrowheads points outward, while the other set points inward. The line with arrowheads pointing outward appears longer than the one with arrowheads pointing inward. This illusion is named after Franz Müller-Lyer, who first described it in the late 19th century.

The __________ Illusion Leads Us to Perceive Two Lines of Identical