The University of Southampton
University of Southampton Institutional Repository

Perceptual failures in the selection and identification of low-prevalence targets in relative prevalence visual search

Perceptual failures in the selection and identification of low-prevalence targets in relative prevalence visual search
Perceptual failures in the selection and identification of low-prevalence targets in relative prevalence visual search
Previous research has shown that during visual search tasks target prevalence (the proportion of trials in which a target appears) influences both the probability that a target will be detected, and the speed at which participants will quit searching and provide an ‘absent’ response. When prevalence is low (e.g., target presented on 2 % of trials), participants are less likely to detect the target than when prevalence is higher (e.g., 50 % of trials). In the present set of experiments, we examined perceptual failures to detect low prevalence targets in visual search. We used a relative prevalence search task in order to be able to present an overall 50 % target prevalence and thereby prevent the results being accounted for by early quitting behavior. Participants searched for two targets, one of which appeared on 45 % of trials and another that appeared on 5 % of trials, leaving overall target prevalence at 50 %. In the first experiment, participants searched for two dissimilar targets; in the second experiment, participants searched for two similar targets. Overall, the results supported the notion that a reduction in prevalence primarily influenced perceptual failures of identification, rather than of selection. Together, these experiments add to a growing body of research exploring how and why observers fail to detect low prevalence targets, especially in real-world tasks in which some targets are more likely to appear than others.
1943-3921
Godwin, H.J.
df22dc0c-01d1-440a-a369-a763801851e5
Menneer, T.
d684eaf6-1494-4004-9973-cb8ccc628efa
Riggs, C.A.
fe7fd2d9-f6d4-4951-b635-713d9a4bb9d0
Cave, K.R.
6b785a60-6331-429a-9b98-d0b10264db5b
Donnelly, N.
05c83b6b-ee8d-4c9d-85dc-c5dcd6b5427b
Godwin, H.J.
df22dc0c-01d1-440a-a369-a763801851e5
Menneer, T.
d684eaf6-1494-4004-9973-cb8ccc628efa
Riggs, C.A.
fe7fd2d9-f6d4-4951-b635-713d9a4bb9d0
Cave, K.R.
6b785a60-6331-429a-9b98-d0b10264db5b
Donnelly, N.
05c83b6b-ee8d-4c9d-85dc-c5dcd6b5427b

Godwin, H.J., Menneer, T., Riggs, C.A., Cave, K.R. and Donnelly, N. (2014) Perceptual failures in the selection and identification of low-prevalence targets in relative prevalence visual search. Attention, Perception, & Psychophysics. (doi:10.3758/s13414-014-0762-8).

Record type: Article

Abstract

Previous research has shown that during visual search tasks target prevalence (the proportion of trials in which a target appears) influences both the probability that a target will be detected, and the speed at which participants will quit searching and provide an ‘absent’ response. When prevalence is low (e.g., target presented on 2 % of trials), participants are less likely to detect the target than when prevalence is higher (e.g., 50 % of trials). In the present set of experiments, we examined perceptual failures to detect low prevalence targets in visual search. We used a relative prevalence search task in order to be able to present an overall 50 % target prevalence and thereby prevent the results being accounted for by early quitting behavior. Participants searched for two targets, one of which appeared on 45 % of trials and another that appeared on 5 % of trials, leaving overall target prevalence at 50 %. In the first experiment, participants searched for two dissimilar targets; in the second experiment, participants searched for two similar targets. Overall, the results supported the notion that a reduction in prevalence primarily influenced perceptual failures of identification, rather than of selection. Together, these experiments add to a growing body of research exploring how and why observers fail to detect low prevalence targets, especially in real-world tasks in which some targets are more likely to appear than others.

Full text not available from this repository.

More information

e-pub ahead of print date: 12 September 2014
Published date: 12 September 2014
Organisations: Psychology

Identifiers

Local EPrints ID: 371677
URI: https://eprints.soton.ac.uk/id/eprint/371677
ISSN: 1943-3921
PURE UUID: 5380286b-a6e7-42ea-9c00-6937d664b0a4

Catalogue record

Date deposited: 12 Nov 2014 12:28
Last modified: 02 Jul 2018 16:31

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×