New objects dominate luminance transients in setting attentional priority.
J Exp Psychol Hum Percept Perform
; 27(6): 1287-302, 2001 Dec.
Article
em En
| MEDLINE
| ID: mdl-11766925
ABSTRACT
Both the sudden appearance of an object and sudden changes in existing object features influence priority in visual search. However, direct comparisons of these influences have not been made under controlled conditions. In 5 visual search experiments, new object onsets were compared directly with changes in the luminance of old objects. Factors included the luminance contrast of items against the background, the magnitude of luminance change, and the probability that these changes were associated with the target item. New objects were consistently more effective in guiding search, such that a new item with very low luminance contrast was equivalent to an old item undergoing a large change in luminance. An important exception was an old item changing in contrast and polarity, which was as effective as the appearance of a new object. This indicates that search priority is biased toward object rather than situational changes.
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Base de dados:
MEDLINE
Assunto principal:
Atenção
/
Luz
Idioma:
En
Ano de publicação:
2001
Tipo de documento:
Article