TEXTURE-BASED TASKS ARE LITTLE AFFECTED BY 2ND TASKS REQUIRING PERIPHERAL OR CENTRAL ATTENTIVE FIXATION
TEXTURE-BASED TASKS ARE LITTLE AFFECTED BY 2ND TASKS REQUIRING PERIPHERAL OR CENTRAL ATTENTIVE FIXATION
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DOI：
10.1068/p200483
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发表时间：
1991-01-01
期刊：
影响因子：
1.7
通讯作者：
SAGI, D
中科院分区：
文献类型：
--
作者：
BRAUN, J;SAGI, D
实验中，观察员试图同时执行两个独立的视觉任务。使用了两种类型的任务：T形或L形字母目标的识别，和检测或定位的纹理元素的唯一方向（纹理目标）在一个密集的纹理。结合这些任务，形成不同的任务对，性能作为刺激起始时间（SOA）的函数分别建立了一对中的每个任务。此外，当每项任务单独执行时，对业绩进行衡量。当配对时，两个识别任务（T或L）对（两个）字母目标需要一个显着更大的SOA比任何识别任务本身。这一结果表明，参与串行性能和竞争有限的资源，确认字母识别需要注意的固定。然而，当中央字母目标的识别与偏心纹理目标的定位（上或下半野）配对时，在配对中的性能与每个任务本身的性能相当。这意味着并行执行和缺乏资源冲突。结果是相似的，当一个偏心字母目标的识别与偏心纹理目标的检测（存在或不存在）配对。这些结果是一致的纹理奇异性的定位和检测不需要注意的固定的可能性。
Experiments are described in which observers attempted to perform concurrently two separate visual tasks. Two types of tasks were used: the identification of a T-shaped or L-shaped letter target, and the detection or localization of a texture element of unique orientation (texture target) within a dense texture. Combining these tasks to form various task pairs, performance as a function of stimulus onset asynchrony (SOA) was established separately for each task in a pair. In addition, performance was measured when each task was carried out by itself. When paired, two identification tasks (T or L) on (two) letter targets required a significantly larger SOA than either identification task by itself. This outcome suggests the involvement of serial performance and competition for a limited resource, confirming that letter identification requires attentive fixation. However, when the identification of a central letter target was paired with the localization (upper or lower hemifield) of an eccentric texture target, performance in the pair was comparable to performance of each task by itself. This suggests parallel performance and a lack of conflict over resources. The outcome was similar when the identification of an eccentric letter target was paired with the detection (present or absent) of an eccentric texture target. These results are consistent with the possibility that localization and detection of a textural singularity do not require attentive fixation.