Psychophysics of the structure of object memory Cristina Savin.

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Presentation transcript:

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, I.Prototype-referenced shape encoding revealed by high-level aftereffects Biederman and M. Bar, One-shot viewpoint invariance in matching novel objects, Vision Research, 39(17), p.2885, 1999.One-shot viewpoint invariance in matching novel objects M. Tarr et al., Three-dimensional object recognition is viewpoint dependent, Nature Neuroscience, 1(4), p.275, 1998.Three-dimensional object recognition is viewpoint dependent A. McKyton and E. Zohary, Beyond Retinotopic Mapping: The Spatial Representation of Objects in the Human Lateral Occipital Complex, Cerebral Cortex, 17: , 2007.Beyond Retinotopic Mapping: The Spatial Representation of Objects in the Human Lateral Occipital Complex