A device for demonstrating Duncker's induced movement (IM) is described. A black-bordered vertically-oriented rectangle enclosing a dot is presented on each side of a display, which is rotated on a record turntable. Upon rotation an objectively stationary point is seen as oscillating vertically (IM) in the direction opposite that shown by the rectangles.
References
1.
DunckerK.Induced movement. In EllisW. D. (Ed.), A source book of Gestalt psychology. New York: Humanities Press, 1950. Pp. 161–172.
