Attention to overlapping objects: Detection and discrimination of luminance changes
Attention to overlapping objects: Detection and discrimination of luminance changes
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DOI：
10.1037/0096-1523.26.1.342
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发表时间：
2000-02-01
影响因子：
2.1
通讯作者：
Snowden, RJ
中科院分区：
文献类型：
--
作者：
Brawn, PT;Snowden, RJ
在提示范式中评估对两个重叠对象之一的选择性注意。参与者检测或识别出现在 6 个可能目标位置之一（每个物体上 3 个）的目标。发现使用反应时间和性能灵敏度测量来简单检测此类目标具有显着的提示效果。当参与者被要求识别目标的某些方面时，即使任务（检测与识别）等同于整体表现水平，提示效果始终会更大。如果目标位置不再分为 2 个对象，任务之间提示效果的差异就会大大减少。有人认为，相同的刺激可以根据任务类型（而不是任务难度）引起不同的注意机制，并且这些机制在视觉世界表征的性质上有所不同。
Selective attention to 1 of 2 overlapping objects was assessed in a cuing paradigm. Participants detected or identified targets that appeared in 1 of 6 possible target locations (3 on each object). Significant cuing effects for the simple detection of such targets using both reaction time and sensitivity measures of performance were found. Cuing effects were consistently greater when the participants were required to identify some aspect of the target even when the tasks (detection vs. identification) were equated for overall performance level. These differences in cuing effects between tasks were much reduced if the target locations were no longer grouped into 2 objects. It is suggested that identical stimuli can elicit differing attentional mechanisms depending on task type (rather than task difficulty) and that these mechanisms differ in the nature of the representation of the visual world.