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.