title: The horizontal-vertical delusion.
abstract: Most people can correctly apply the concepts of horizontal and vertical in describing objects, but a simple demonstration shows that they are confused about how these concepts work. The nature of the confusion and its possible causes are briefly discussed.
authors.affiliation: Computer Science Department, University of Toronto, Ontario, Canada.
authors.forename: G E
authors.initials: GE
authors.lastname: Hinton
mesh_terms: D006801:Humans; D007092:Imagination; D007802:Language; D055585:Physical Phenomena; D010825:Physics; D013028:Space Perception