title: Mathematical model for assimilation and contrast in perception of extent.
abstract: A mathematical model for assimilation and contrast in the perception of extent is presented, and predictions generated from the model are empirically tested. Implications of the model for the Müller-Lyer illusion are dealt with explicitly, and implications of the model for the Delboeuf, Ebbinghaus, and other illusions of extent are discussed in general terms.
mesh_terms: D004192:Discrimination, Psychological; D004215:Distance Perception; D004777:Environment; D006801:Humans; D007088:Illusions; D008962:Models, Theoretical; D009903:Optical Illusions; D009949:Orientation; D012858:Size Perception