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Psychophysics of the structure of object memory Cristina Savin.

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Presentation on theme: "Psychophysics of the structure of object memory Cristina Savin."— Presentation transcript:

1 Psychophysics of the structure of object memory Cristina Savin

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

3 Object representation Region specific: –Objects: LOC –Faces: FFA –Tools, etc.

4 LOC Lateral Occipital Complex Object representation

5 Face representation

6 Prototype-referenced representation

7 LOC adaptation

8 Contralateral hemisphere

9 Retinal vs Head centered

10 Both -small retinal -significantly more adaptation in for the same side -results suggest a head/body centered reference frame in LOC

11 3D Objects: a set of gluons

12 One-shot viewpoint invariance in matching novel objects

13 3D objects representation: a critique

14 References D. Leopold et al., Prototype-referenced shape encoding revealed by high-level aftereffects, Nature Neuroscience, 4(1), p.89, 2001. 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, 17:1164-1172, 2007.Beyond Retinotopic Mapping: The Spatial Representation of Objects in the Human Lateral Occipital Complex


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