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The importance of search strategy for finding targets in open terrain

Riggs, Charlotte A., Cornes, Katherine, Godwin, Hayward J., Liversedge, Simon P., Guest, Richard, Donnelly, Nick (2017) The importance of search strategy for finding targets in open terrain. Cognitive Research: Principles and Implications, 2 (1). Article Number 14. ISSN 2365-7464. (doi:10.1186/s41235-017-0049-4) (KAR id:60885)


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.

Item Type: Article
DOI/Identification number: 10.1186/s41235-017-0049-4
Uncontrolled keywords: Visual search; Large-scale search; Search strategy; Paired searching; Foraging; Multiple targets
Subjects: T Technology
Divisions: Faculties > Sciences > School of Engineering and Digital Arts > Image and Information Engineering
Depositing User: Tina Thompson
Date Deposited: 13 Mar 2017 15:25 UTC
Last Modified: 20 Nov 2020 09:40 UTC
Resource URI: (The current URI for this page, for reference purposes)
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