The importance of search strategy for finding targets in open terrain.
The importance of search strategy for finding targets in open terrain.
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DOI：
10.1186/s41235-017-0049-4
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Donnelly N
中科院分区：
文献类型：
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作者：
Riggs CA;Cornes K;Godwin HJ;Liversedge SP;Guest R;Donnelly N
许多现实世界的搜索任务（即警察搜索，简易爆炸装置的检测）需要搜索人员在开阔的地面上进行彻底搜索。在本研究中，我们模拟了这个问题，要求个人（实验1a和1b）和二人组（实验2）搜索硬币目标伪随机位于一个有界区域的开放草原地形。在实验1a中，准确性，搜索时间，和用于搜索区域的路线进行了测量。参与者倾向于使用一个“S”形的模式与一个共同的宽度搜索车道。准确性的提高与搜索速度的减慢有关，但也是可变的，尽管只有当参与者沿着搜索区域的长度（而不是宽度）移动时。实验1b改变了有界搜索区域内可用的目标数量，并在这样做时改变了目标的流行率和密度。结果证实，实验1a中采用的路线概括了目标患病率/密度的变化。在实验2中，准确性，搜索时间，和搜索策略使用的二分体进行了测量。虽然二人组比个人更准确，但选择进行两次独立搜索的二人组比选择分割搜索空间的二人组更准确。这些结果的影响，为个人和二人组在开放空间中搜索目标时进行了讨论。
A number of real-world search tasks (i.e. police search, detection of improvised explosive devices (IEDs)) require searchers to search exhaustively across open ground. In the present study, we simulated this problem by asking individuals (Experiments 1a and 1b) and dyads (Experiment 2) to search for coin targets pseudo-randomly located in a bounded area of open grassland terrain. In Experiment 1a, accuracy, search time, and the route used to search an area were measured. Participants tended to use an ‘S’-shaped pattern with a common width of search lane. Increased accuracy was associated with slower, but also variable, search speed, though only when participants moved along the length (as opposed to across the width) of the search area. Experiment 1b varied the number of targets available within the bounded search area and in doing so varied target prevalence and density. The results confirmed that the route taken in Experiment 1a generalizes across variations in target prevalence/density. In Experiment 2, accuracy, search time, and the search strategy used by dyads was measured. While dyads were more accurate than individuals, dyads that opted to conduct two independent searches were more accurate than those who opted to split the search space. The implications of these results for individuals and dyads when searching for targets in open space are discussed.