Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Viewpoint dependency in visual object recognition does not necessarily imply viewer-centered representation
Autore:
Bar, M;
Indirizzi:
Harvard Univ, Massachusetts Gen Hosp, Cambridge, MA 02138 USA Harvard Univ Cambridge MA USA 02138 tts Gen Hosp, Cambridge, MA 02138 USA
Titolo Testata:
JOURNAL OF COGNITIVE NEUROSCIENCE
fascicolo: 6, volume: 13, anno: 2001,
pagine: 793 - 799
SICI:
0898-929X(20010815)13:6<793:VDIVOR>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
INFERIOR TEMPORAL CORTEX; STRIATE CORTEX; MEMORY; MONKEY; INVARIANCE; MECHANISMS; HIPPOCAMPUS; NEURONS; NETWORK; HUMANS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
54
Recensione:
Indirizzi per estratti:
Indirizzo: Bar, M Harvard Univ, Dept Psychol, Room 864,William James Hall, Cambridge,MA 02138 USA Harvard Univ Room 864,William James Hall Cambridge MA USA 02138 USA
Citazione:
M. Bar, "Viewpoint dependency in visual object recognition does not necessarily imply viewer-centered representation", J COGN NEUR, 13(6), 2001, pp. 793-799

Abstract

The nature of visual object representation in the brain is the subject of a prolonged debate. One set of theories asserts that objects are represented by their structural description and the representation is "object-centered. " Theories from the other side of the debate suggest that humans store multiple "snapshots" for each object, depicting it as seen under various conditions, and the representation is therefore "viewer-centered. " The principal tool that has been used to support and criticize each of these hypothesesis subjects' performance in recognizing objects under novel viewing conditions. For example, if subjects take more time in recognizing an object froman unfamiliar viewpoint, it is common to claim that the representation of that object is viewpoint-dependent and therefore viewer-centered, it is suggested here, however, that performance cost in recognition of objects undernovel conditions may he misleading when studying the nature of object representation, Specifically, it is argued that viewpoint-dependent performanceis not necessarily an indication of viewer-centered representation. An account for the neural basis of perceptual priming is first provided. In lightof this account, it is conceivable that viewpoint dependency reflects the utilization of neural paths with different levels of sensitivity en route to the same representation, rather than the existence of viewpoint-specific representations. New experimental paradigms are required to study the validity of the viewer-centered approach.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/01/20 alle ore 21:16:44