Target probability modulates fixation-related potentials in visual search
Hiebel, Hannah ; Ischebeck, Anja ; Brunner, Clemens ; Nikolaev, Andrey R LU
; Höfler, Margit
and Körner, Christof
(2018)
In Biological Psychology
138.
p.199-210
- Abstract
This study investigated the influence of target probability on the neural response to target detection in free viewing visual search. Participants were asked to indicate the number of targets (one or two) among distractors in a visual search task while EEG and eye movements were co-registered. Target probability was manipulated by varying the set size of the displays between 10, 22, and 30 items. Fixation-related potentials time-locked to first target fixations revealed a pronounced P300 at the centro-parietal cortex with larger amplitudes for set sizes 22 and 30 than for set size 10. With increasing set size, more distractor fixations preceded the detection of the target, resulting in a decreased target probability and, consequently, a... (More)
This study investigated the influence of target probability on the neural response to target detection in free viewing visual search. Participants were asked to indicate the number of targets (one or two) among distractors in a visual search task while EEG and eye movements were co-registered. Target probability was manipulated by varying the set size of the displays between 10, 22, and 30 items. Fixation-related potentials time-locked to first target fixations revealed a pronounced P300 at the centro-parietal cortex with larger amplitudes for set sizes 22 and 30 than for set size 10. With increasing set size, more distractor fixations preceded the detection of the target, resulting in a decreased target probability and, consequently, a larger P300. For distractors, no increase of P300 amplitude with set size was observed. The findings suggest that set size specifically affects target but not distractor processing in overt serial visual search.
(Less)
- author
- Hiebel, Hannah
; Ischebeck, Anja
; Brunner, Clemens
; Nikolaev, Andrey R
LU
; Höfler, Margit
and Körner, Christof
- publishing date
- 2018-10
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Adult, Attention/physiology, Cerebral Cortex/physiology, Event-Related Potentials, P300/physiology, Evoked Potentials/physiology, Female, Fixation, Ocular/physiology, Humans, Male, Probability, Visual Perception/physiology, Young Adult
- in
- Biological Psychology
- volume
- 138
- pages
- 12 pages
- publisher
- Elsevier
- external identifiers
-
- scopus:85054462022
- pmid:30253233
- ISSN
- 0301-0511
- DOI
- 10.1016/j.biopsycho.2018.09.007
- language
- English
- LU publication?
- no
- additional info
- Copyright © 2018 Elsevier B.V. All rights reserved.
- id
- 06b2479d-e42f-4661-8758-a03cafa90061
- date added to LUP
- 2019-10-21 19:23:58
- date last changed
- 2024-04-16 22:03:43
@article{06b2479d-e42f-4661-8758-a03cafa90061,
abstract = {{<p>This study investigated the influence of target probability on the neural response to target detection in free viewing visual search. Participants were asked to indicate the number of targets (one or two) among distractors in a visual search task while EEG and eye movements were co-registered. Target probability was manipulated by varying the set size of the displays between 10, 22, and 30 items. Fixation-related potentials time-locked to first target fixations revealed a pronounced P300 at the centro-parietal cortex with larger amplitudes for set sizes 22 and 30 than for set size 10. With increasing set size, more distractor fixations preceded the detection of the target, resulting in a decreased target probability and, consequently, a larger P300. For distractors, no increase of P300 amplitude with set size was observed. The findings suggest that set size specifically affects target but not distractor processing in overt serial visual search.</p>}},
author = {{Hiebel, Hannah and Ischebeck, Anja and Brunner, Clemens and Nikolaev, Andrey R and Höfler, Margit and Körner, Christof}},
issn = {{0301-0511}},
keywords = {{Adult; Attention/physiology; Cerebral Cortex/physiology; Event-Related Potentials, P300/physiology; Evoked Potentials/physiology; Female; Fixation, Ocular/physiology; Humans; Male; Probability; Visual Perception/physiology; Young Adult}},
language = {{eng}},
pages = {{199--210}},
publisher = {{Elsevier}},
series = {{Biological Psychology}},
title = {{Target probability modulates fixation-related potentials in visual search}},
url = {{http://dx.doi.org/10.1016/j.biopsycho.2018.09.007}},
doi = {{10.1016/j.biopsycho.2018.09.007}},
volume = {{138}},
year = {{2018}},
}