Preattentive guidance of eye movements during triple conjunction search tasks: The effects of feature discriminability and saccadic amplitude
Preattentive guidance of eye movements during triple conjunction search tasks: The effects of feature discriminability and saccadic amplitude
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三连搜索任务期间眼球运动的预防性引导：特征辨别力和扫视幅度的影响
DOI：
10.3758/bf03196182
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发表时间：
2001
影响因子：
3.5
通讯作者：
E. Reingold
中科院分区：
文献类型：
--
作者：
Diane E. Williams;E. Reingold
在执行三重连接搜索任务期间，对眼动进行监测。刺激的颜色、形状和方向各不相同。在所有试验中，目标要么存在要么不存在，显示器由6、12或24个刺激组成。刺激辨别力被操纵的形状尺寸，一半的参与者看到显示的Es和Fs（低辨别力[LD]条件）和一半看到显示的Cs和Ts（高辨别力[HD]条件）。两种情况下的参与者都执行了两项搜索任务。在单特征（SF）任务中，目标刺激与每个分心物共享一个特征，而在双特征（TF）任务中，它与每个分心物共享两个特征。对扫视终点的检查显示，参与者更有可能关注与目标共享颜色（SF任务）或颜色和形状（TF任务）的干扰刺激。这是一个强有力的发现，在参与者中观察到不同幅度和顺序位置的扫视，并在短时间和长时间的扫视之后移动。参与者利用形状信息的程度随着辨别能力的增加而增加。
Eye movements were monitored during the performance of triple conjunction search tasks. Stimuli varied in color, shape, and orientation. Across trials, the target was either present or absent, and displays consisted of 6, 12, or 24 stimuli. Stimulus discriminability was manipulated for the shape dimension, with half of the participants seeing displays of Es and Fs (low-discriminability [LD] condition) and half seeing displays of Cs and Ts (high-discriminability [HD] condition). Participants in both conditions performed two search tasks. In the single-feature (SF) task, the target stimulus shared one feature with each of the distractors, whereas in the two-feature (TF) task, it shared two features with each distractor. An examination of saccadic endpoints revealed that participants were more likely to fixate on distractor stimuli sharing color (SF task) or color and shape (TF task) with the target. This was a robust finding, being observed across participants, saccades of different amplitudes and sequential position, and following short and long latencies to move. The extent to which participants made use of shape information increased with discriminability.