The impact of Relative Prevalence on dual-target search for threat items from airport X-ray screening

Acta Psychologica
Hayward J GodwinNick Donnelly

Abstract

The probability of target presentation in visual search tasks influences target detection performance: this is known as the prevalence effect (Wolfe et al., 2005). Additionally, searching for several targets simultaneously reduces search performance: this is known as the dual-target cost (DTC: Menneer et al., 2007). The interaction between the DTC and prevalence effect was investigated in a single study by presenting one target in dual-target search at a higher level of prevalence than the other target (Target A: 45% Prevalence; Target B: 5% Prevalence). An overall DTC was found for both RTs and response accuracy. Furthermore, there was an effect of target prevalence in dual-target search, suggesting that, when one target is presented at a higher level of prevalence than the other, both the dual-target cost and the prevalence effect contribute to decrements in performance. The implications for airport X-ray screening are discussed.

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Citations

Apr 13, 2012·The Quarterly Journal of Experimental Psychology : QJEP·Nicholas C C Russell, Melina A Kunar
Feb 4, 2014·PloS One·Doug J K Barrett, Oliver Zobay
Mar 13, 2013·Attention, Perception & Psychophysics·Nicholas Hon, Chia-Howe Tan
Sep 17, 2014·Acta Psychologica·Adam T BiggsStephen R Mitroff
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Jun 6, 2021·Attention, Perception & Psychophysics·Hayward J GodwinAnthony S Barnhart

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