Psychophysics of the structure of object memory

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Psychophysics of the structure of object memory

• Cristina Savin

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Overview

• Prototype referenced encoding of faces
• LOC and object representation
• 3D objects

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Object representation

• Region specific
• Objects LOC
• Faces FFA
• Tools, etc.

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LOC

• Lateral Occipital Complex
• Object representation

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Face representation
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Prototype-referenced representation
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LOC adaptation
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Contralateral hemisphere
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Retinal vs Head centered
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Both
-small retinal -significantly more adaptation in
for the same side -results suggest a head/body
centered reference frame in LOC
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3D Objects a set of gluons
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One-shot viewpoint invariance in matching novel
objects
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3D objects representation a critique
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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, 171164-1172, 2007.