David Bourget (Western Ontario)
David Chalmers (ANU, NYU)
Rafael De Clercq
Ezio Di Nucci
Jack Alan Reynolds
Learn more about PhilPapers
In C. Lefebvre & H. Cohen (eds.), Handbook of Categorization. Elsevier (2005)
2. Invariant Sensorimotor Features ("Affordances"). To say this is not to declare oneself a Gibsonian, whatever that means. It is merely to point out that what a sensorimotor system can do is determined by what can be extracted from its motor interactions with its sensory input. If you lack sonar sensors, then your sensorimotor system cannot do what a bat's can do, at least not without the help of instruments. Light stimulation affords color vision for those of us with the right sensory apparatus, but not for those of us who are color-blind. The geometric fact that, when we move, the "shadows" cast on our retina by nearby objects move faster than the shadows of further objects means that, for those of us with normal vision, our visual input affords depth perception. From more complicated facts of projective and solid geometry it follows that a 3-dimensional shape, such as, say, a boomerang, can be recognized as being the same shape Ð and the same size Ð even though the size and shape of its shadow on our retinas changes as we move in relation to it or it moves in relation to us. Its shape is said to be invariant under these sensorimotor transformations, and our visual systems can detect and extract that invariance, and translate it into a visual constancy. So we keep seeing a boomerang of the same shape and size even though the shape and size of its retinal shadows keep changing
|Keywords||No keywords specified (fix it)|
|Categories||categorize this paper)|
Setup an account with your affiliations in order to access resources via your University's proxy server
Configure custom proxy (use this if your affiliation does not provide a proxy)
|Through your library|
References found in this work BETA
No references found.
Citations of this work BETA
Vincent de Gardelle, Lucie Charles & Sid Kouider (2011). Perceptual Awareness and Categorical Representation of Faces: Evidence From Masked Priming. Consciousness and Cognition 20 (4):1272-1281.
Stevan Harnad (2010). Eliminating the “Concept” Concept. Behavioral and Brain Sciences 33 (2/3):213-214.
Joanna Korman, John Voiklis & Bertram F. Malle (2015). The Social Life of Cognition. Cognition 135:30-35.
Similar books and articles
Kirk A. Ludwig (1996). Shape Properties and Perception. In Enrique Villanueva (ed.), Philosophical Issues. Atascadero: Ridgeview 325-350.
Robert Briscoe (2008). Vision, Action, and Make‐Perceive. Mind and Language 23 (4):457-497.
David H. Sanford (1983). The Perception of Shape. In Carl Ginet & Sydney Shoemaker (eds.), Knowledge And Mind: Phil Essays. Oxford University Press
D. J. Bennett (2012). Seeing Shape: Shape Appearances and Shape Constancy. British Journal for the Philosophy of Science 63 (3):487-518.
Tom Stoneham (2011). Catching Berkeley's Shadow. Southern Journal of Philosophy 49 (2):116-136.
Manish Singh & Barbara Landau (1998). Parts of Visual Shape as Primitives for Categorization. Behavioral and Brain Sciences 21 (1):36-37.
Aage Slomann (1968). Perception of Size. Inquiry 11 (1-4):101 – 113.
Charles Siewert (2006). Is the Appearance of Shape Protean? Psyche 12 (3):1-16.
Added to index2009-01-28
Total downloads77 ( #55,443 of 1,907,383 )
Recent downloads (6 months)7 ( #108,771 of 1,907,383 )
How can I increase my downloads?