Abstract
To investigate the mechanism of visual selective attention, the present study was designed to further examine whether the controversial “within-object effect” was space-based or object-based. First, the present study replicated the previous finding by observing that the subjects responded faster to validly cued relative to invalidly cued targets, which suggested the existence of space-based attentional component. Moreover, it was found that, perceptual organization between two context objects attenuated by changing their shape and color, the “within-object effect” was independent on the distance. The latter result provided further evidence for the existence of the object-based component of visual selective attention, and suggested that, what visual attention selects is the “perceptual object” grouped by pre-attentive perceptual organization.
| Keywords: | selective attention; object-based; space-based; attentional shift; perceptual organization |
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