The impact of Relative Prevalence on dual-target search for threat items from airport X-ray screening
The impact of Relative Prevalence on dual-target search for threat items from airport X-ray screening
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.
Airport security, Visual search, Signal detection, Low-prevalence, Dual-target search
79-84
Godwin, H.J.
df22dc0c-01d1-440a-a369-a763801851e5
Menneer, T.
d684eaf6-1494-4004-9973-cb8ccc628efa
Cave, K.R.
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Helman, S.
7ce5fe48-5bba-4a69-93ec-91caa3ca9bfc
Way, R.L.
f3bde3b4-11cb-4abc-a227-c7d128b6faa6
Donnelly, N.
05c83b6b-ee8d-4c9d-85dc-c5dcd6b5427b
May 2010
Godwin, H.J.
df22dc0c-01d1-440a-a369-a763801851e5
Menneer, T.
d684eaf6-1494-4004-9973-cb8ccc628efa
Cave, K.R.
6b785a60-6331-429a-9b98-d0b10264db5b
Helman, S.
7ce5fe48-5bba-4a69-93ec-91caa3ca9bfc
Way, R.L.
f3bde3b4-11cb-4abc-a227-c7d128b6faa6
Donnelly, N.
05c83b6b-ee8d-4c9d-85dc-c5dcd6b5427b
Godwin, H.J., Menneer, T., Cave, K.R., Helman, S., Way, R.L. and Donnelly, N.
(2010)
The impact of Relative Prevalence on dual-target search for threat items from airport X-ray screening.
Acta Psychologica, 134 (1), .
(doi:10.1016/j.actpsy.2009.12.009).
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.
Text
Relative_Prevalence.pdf
- Author's Original
More information
Published date: May 2010
Keywords:
Airport security, Visual search, Signal detection, Low-prevalence, Dual-target search
Identifiers
Local EPrints ID: 73194
URI: http://eprints.soton.ac.uk/id/eprint/73194
PURE UUID: d7ae962a-ef12-466f-9fd6-0cd192f48f44
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Date deposited: 03 Mar 2010
Last modified: 14 Mar 2024 02:55
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Contributors
Author:
T. Menneer
Author:
K.R. Cave
Author:
S. Helman
Author:
R.L. Way
Author:
N. Donnelly
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