An optical illusion in which an arrangement of horizontal and vertical bars of various lengths may be viewed as either a series of rectangles or a series of circles.

A cognitive bias by which people wrongly think that they have direct insight into the origins of their mental states, while treating other people's introspections as unreliable.

plural of introspection illusion

plural of coffer illusion

(psychology) The psychological illusion by which people tend to believe that their personalities and preferences have reached a more or less stable state, despite recognising that these things have undergone significant change in the past.

plural of Müller-Lyer illusion

An optical illusion consisting of a stylized arrow whose midpoint appears to be closer to the tail end.

A tactile illusion where tapping separate regions of a person's skin in rapid succession (e.g. the elbow and the forearm) gives the impression of sequential taps "hopping" from one point to the next, even though the intermediate points were never touched.

(philosophy) An argument for the existence of sense-data, and thus a criticism of direct realism, according to which what we perceive (such as a stick that looks bent because it is viewed underwater) is distinct from the actual thing perceived (the straight stick).

plural of argument from illusion