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.
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References
1.
DunckerK.Induced movement. In EllisW. D. (Ed.), A source book of Gestalt psychology. New York: Humanities Press, 1950. Pp. 161–172.
