Local and global orientation in visual search.
Percept Psychophys
; 59(6): 941-63, 1997 Aug.
Article
en En
| MEDLINE
| ID: mdl-9270367
Six experiments investigated the role of global (shape) and local (contour) orientation in visual search for an orientation target. Experiment 1 demonstrated that search for a conjunction of local contours with a distinct global orientation was less efficient than search for a target featurally distinct in terms of both global and local contour orientation. However, Experiments 2 and 4 demonstrated that the presence of a unique line contour was neither sufficient nor necessary to allow efficient search. Experiment 5 found that search for a local orientation difference was strongly impeded by irrelevant variation in global orientation, arguing for a preeminent role for global orientation. Finally, Experiment 6 demonstrated that the orientation search asymmetry holds for the global orientation of stimuli. Taken together, the results are consistent with visual search processes guided predominantly by a representation of global orientation.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Orientación
/
Percepción Visual
Límite:
Adult
/
Humans
Idioma:
En
Revista:
Percept Psychophys
Año:
1997
Tipo del documento:
Article
País de afiliación:
Reino Unido
Pais de publicación:
Estados Unidos