Timing of saccadic eye movements during visual search for multiple targets.
Timing of saccadic eye movements during visual search for multiple targets.
复制标题
视觉搜索多个目标期间眼球扫视运动的时间。
DOI：
10.1167/13.11.11
复制
发表时间：
2013
影响因子：
1.8
通讯作者：
Kowler,Eileen
中科院分区：
文献类型：
--
作者：
Wu,Chia-Chien;Kowler,Eileen
翻译后摘要：摘要视觉搜索需要扫视序列。许多研究都集中在空间方面的扫视决策，而相对较少（如，Hooge & Erkelens，1999）考虑时间。我们研究了扫视时间在搜索目标（包含倾斜线的细圆）位于非目标（厚圆）。任务要求（a）估计线条的平均倾斜度，或（B）在没有并发心理物理任务的情况下观察目标。目标和非目标的视觉相似性影响了两项任务中击中目标的概率和眼跳率。扫视时间也取决于即时条件，具体而言，（a）当前注视位置的类型（在目标上的停留时间比非目标长），（B）目标的类型（在击中目标的扫视之前停留时间较短），以及（c）序列中扫视的顺序位置。结果表明，时间决策考虑到寻找目标的难度，以及延迟的成本。定时策略可能是一种折衷方案，既可以尝试使用偏心视觉（以增加停留时间为代价）来寻找和定位目标或其他合适的着陆位置，也可以采用快速探索选择性较低的策略。
Abstract:Abstract Visual search requires sequences of saccades. Many studies have focused on spatial aspects of saccadic decisions, while relatively few (eg, Hooge & Erkelens, 1999) consider timing. We studied saccadic timing during search for targets (thin circles containing tilted lines) located among nontargets (thicker circles). Tasks required either (a) estimating the mean tilt of the lines, or (b) looking at targets without a concurrent psychophysical task. The visual similarity of targets and nontargets affected both the probability of hitting a target and the saccade rate in both tasks. Saccadic timing also depended on immediate conditions, specifically,(a) the type of currently fixated location (dwell time was longer on targets than nontargets),(b) the type of goal (dwell time was shorter prior to saccades that hit targets), and (c) the ordinal position of the saccade in the sequence. The results show that timing decisions take into account the difficulty of finding targets, as well as the cost of delays. Timing strategies may be a compromise between the attempt to find and locate targets, or other suitable landing locations, using eccentric vision (at the cost of increased dwell times) versus a strategy of exploring less selectively at a rapid rate.