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Psychophysics of the structure of object memory
Cristina Savin
Overview
• Prototype referenced encoding of faces
• LOC and object representation
• 3D objects
Object representation
• Region specific:– Objects: LOC– Faces: FFA– Tools, etc.
LOC
• Lateral Occipital Complex
• Object representation
Face representation
Prototype-referenced representation
LOC adaptation
Contralateral hemisphere
Retinal vs Head centered
Both
-small retinal-significantly more adaptation in for the same side-results suggest a head/body centered reference frame in LOC
3D Objects: a set of gluons
One-shot viewpoint invariance in matching novel objects
3D objects representation: a critique
References
• D. Leopold et al., Prototype-referenced shape encoding revealed by high-level aftereffects , Nature Neuroscience, 4(1), p.89, 2001. I.
• Biederman and M. Bar, One-shot viewpoint invariance in matching novel objects , Vision Research, 39(17), p.2885, 1999.
• M. Tarr et al., Three-dimensional object recognition is viewpoint dependent , Nature Neuroscience, 1(4), p.275, 1998.
• A. McKyton and E. Zohary, Beyond Retinotopic Mapping: The Spatial Representation of Objects in the Human Lateral Occipital Complex, Cerebral Cortex, 17:1164-1172, 2007.