Object-based Attention : Effects of Cue Informativeness and Spatial Focus
Date Issued
2004
Date
2004
Author(s)
Hu, Chi-Ming
DOI
zh-TW
Abstract
The purpose of this study was to examine the effects of cue informativeness and spatial focus on object-based attention. The double-rectangle spatial-cueing paradigm of Egly, Rafal, and Driver（1994） was used and the same object effect （SOE, faster RT when the cue and the target are in the same object than when they belong to different objects） was taken as an index of object-based attention. 林山源（2003）found that cue informativeness is necessary for SOE. However, Goldsmith and Yeari （2003） obtained SOE only when the objects were covered by the spatial focus of attention. We used informative cue and made the participants’ attention focus on the center without covering the objects to resolve the discrepancy between the two studies. In experiment 1, SOE was still observed with an informative peripheral cue and with attention focused on fixation. In Experiment 2 a central cue was used to make attention more focused, and two different cue-to-target SOAs （stimulus onset asynchrony） were manipulated. SOE was found only in the long SOA condition. Experiment 3 used the same peripheral cue as in experiment 1 but two SOAs were manipulated as in Experiment 2. The interaction between SOE and SOA was again observed. The SOEs found under focal attention in Experiments 1-3 indicate that the objects being covered by the initial focus of attention is not the premise for object-based selection; the cue informative-ness is the critical factor. The interactions between SOE and SOA observed in Experiments 2 and 3 support the view that attention spreads within the contour of the object.
Subjects
同物效果
空間位置
注意力選擇
注意力擴散假說
線索提示典範
中央線索
周邊線索。
attention spreading hypothesis
same object effect
spatial-cueing paradigm
stimulus onset asynchrony
attentional focus
peripheral cue
central cue
Type
other
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