title: The visual system supports online translation invariance for object identification.
abstract: The ability to recognize the same image projected to different retinal locations is critical for visual object recognition in natural contexts. According to many theories, the translation invariance for objects extends only to trained retinal locations, so that a familiar object projected to a nontrained location should not be identified. In another approach, invariance is achieved "online," such that learning to identify an object in one location immediately affords generalization to other locations. We trained participants to name novel objects at one retinal location using eyetracking technology and then tested their ability to name the same images presented at novel retinal locations. Across three experiments, we found robust generalization. These findings provide a strong constraint for theories of vision.
authors.affiliation: School of Experimental Psychology, University of Bristol, 12a Priory Road, Bristol, BS8-1TU, UK. j.bowers@bristol.ac.uk.
authors.forename: Jeffrey S
authors.initials: JS
authors.lastname: Bowers
authors.affiliation: School of Experimental Psychology, University of Bristol, 12a Priory Road, Bristol, BS8-1TU, UK.
authors.forename: Ivan I
authors.initials: II
authors.lastname: Vankov
authors.affiliation: School of Experimental Psychology, University of Bristol, 12a Priory Road, Bristol, BS8-1TU, UK.
authors.forename: Casimir J H
authors.initials: CJ
authors.lastname: Ludwig
mesh_terms: D000328:Adult; D005793:Generalization, Psychological / Q000502:physiology*; D006801:Humans; D010364:Pattern Recognition, Visual / Q000502:physiology*; D021641:Recognition, Psychology / Q000502:physiology*; D013028:Space Perception / Q000502:physiology*
keywords: Human visual perception and categorization; Object identification; Object recognition; Perceptual categorization; Translation invariance; Translation tolerance; Vision