Control of fixation duration in a simple search task
Control of fixation duration in a simple search task
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DOI：
10.3758/bf03206825
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发表时间：
1996-10-01
期刊：
影响因子：
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通讯作者：
Erkelens, CJ
中科院分区：
文献类型：
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作者：
Hooge, LTC;Erkelens, CJ
为了深入了解视觉搜索过程中注视持续时间的控制，我们让4名被试执行简单的搜索任务，在这些任务中，我们系统地改变了目标的可辨别性。实验在两种条件下进行。在第一个条件下（封锁），目标的可辨别性在会话期间保持恒定。在第二种条件（混合）下，目标的可辨别性在每次试验中都有所不同。在封闭条件下，注视持续时间随着辨别能力的降低而增加。对于2名受试者，我们发现混合条件下的困难试验比封闭条件下的困难试验的注视持续时间短得多。总的来说，受试者在5%-55%的正确试验中固定目标，继续搜索，然后回到目标。在这些试验中，中央凹目标的分析结果不用于准备下一次扫视。研究结果支持了控制注视持续时间的预编程模型。在一个简单的搜索任务中，控制注视持续时间似乎是间接的。
To obtain insight into the control of fixation duration during visual search, we had 4 subjects perform simple search tasks in which we systematically vaned the discriminability of the target. The experiment was carried out under two conditions. Under the first condition (blocked), the discriminability of the target was kept constant during a session. Under the second condition (mixed), the discriminability of the target varied per trial. Under the blocked condition, fixation duration increased with decreasing discriminability. For 2 subjects, we found much shorter fixation durations in difficult trials with the mixed condition than in difficult trials with the blocked condition. Overall, the subjects fixated the target, continued to search, and then went back to the target in 5%-55% of the correct trials. In these trials, the result of the analysis of the foveal target was not used for preparing the next saccade. The results support a preprogramming model of the control of fixation duration. In a simple search task, control of fixation duration appears to be indirect.