title: On the Müller-Lyer illusion in the Carpentered World.
abstract: Implications of the little noticed fact that projective geometry restricts the range of interfin angles of the Müller-Lyer illusion, which are congruent with retinal projections cast by carpentered objects, are presented and tested. Experimental results support the theoretical restrictions. This implies that only Müller-Lyer figures with interfin angles within the 90 degrees to 180 degrees range are appropriate for investigation of the Carpentered World hypothesis.
authors.affiliation: School of Psychology, King's College, University of Aberdeen, Aberdeen AB24 2UB, Scotland, UK. j.b.deregowski@abdn.ac.uk
authors.forename: Jan B
authors.initials: JB
authors.lastname: Deregowski
mesh_terms: D003463:Cues; D006801:Humans; D009903:Optical Illusions / Q000502:physiology*; D010364:Pattern Recognition, Visual / Q000502:physiology*; D010775:Photic Stimulation / Q000379:methods; D012606:Scotland; D013028:Space Perception / Q000502:physiology*; D013334:Students / Q000523:psychology