Practice-related changes in eye movement strategy in healthy adults with simulated hemianopia

Anna Nowakowska (Corresponding Author), Alasdair D. F. Clarke, Arash Sahraie, Amelia R Hunt

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The impact of visual field deficits such as hemianopia can be mitigated by eye movements that position the visual image within the intact visual field. Effective eye movement strategies are not observed in all patients, however, and it is not known whether persistent deficits are due to injury or to pre-existing individual differences. Here we examined whether repeated exposure to a search task with rewards for good performance would lead to better eye movement strategies in healthy individuals. Participants were exposed to simulated hemianopia during a search task in five testing sessions over five consecutive days and received monetary payment for improvements in search times. With practice, most participants made saccades that went further into the blind field earlier in search, specifically under conditions where little information about the target location would be gained by inspecting the sighted field. These changes in search strategy were correlated with reduced search times. This strategy improvement also generalised to a novel task, with better performance in naming objects in a photograph under conditions of simulated hemianopia after practice with visual search compared to a control group. However, even after five days, eye movements in most participants remained far from optimal. The results demonstrate the benefits, and limitations, of practice and reward in the development of effective coping strategies for visual field deficits.
Original languageEnglish
Pages (from-to)232-240
Number of pages9
JournalNeuropsychologia
Volume128
Early online date31 Jan 2018
DOIs
Publication statusPublished - May 2019

Fingerprint

Hemianopsia
Eye Movements
Visual Fields
Reward
Saccades
Individuality
Control Groups
Practice (Psychology)
Wounds and Injuries

Keywords

  • visual search
  • optimality
  • blindsight
  • hemianopia

Cite this

Practice-related changes in eye movement strategy in healthy adults with simulated hemianopia. / Nowakowska, Anna (Corresponding Author); Clarke, Alasdair D. F.; Sahraie, Arash; Hunt, Amelia R.

In: Neuropsychologia, Vol. 128, 05.2019, p. 232-240.

Research output: Contribution to journalArticle

@article{df708815f0f54a2fa7614e32eac2701d,
title = "Practice-related changes in eye movement strategy in healthy adults with simulated hemianopia",
abstract = "The impact of visual field deficits such as hemianopia can be mitigated by eye movements that position the visual image within the intact visual field. Effective eye movement strategies are not observed in all patients, however, and it is not known whether persistent deficits are due to injury or to pre-existing individual differences. Here we examined whether repeated exposure to a search task with rewards for good performance would lead to better eye movement strategies in healthy individuals. Participants were exposed to simulated hemianopia during a search task in five testing sessions over five consecutive days and received monetary payment for improvements in search times. With practice, most participants made saccades that went further into the blind field earlier in search, specifically under conditions where little information about the target location would be gained by inspecting the sighted field. These changes in search strategy were correlated with reduced search times. This strategy improvement also generalised to a novel task, with better performance in naming objects in a photograph under conditions of simulated hemianopia after practice with visual search compared to a control group. However, even after five days, eye movements in most participants remained far from optimal. The results demonstrate the benefits, and limitations, of practice and reward in the development of effective coping strategies for visual field deficits.",
keywords = "visual search, optimality, blindsight, hemianopia",
author = "Anna Nowakowska and Clarke, {Alasdair D. F.} and Arash Sahraie and Hunt, {Amelia R}",
year = "2019",
month = "5",
doi = "10.1016/j.neuropsychologia.2018.01.020",
language = "English",
volume = "128",
pages = "232--240",
journal = "Neuropsychologia",
issn = "0028-3932",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Practice-related changes in eye movement strategy in healthy adults with simulated hemianopia

AU - Nowakowska, Anna

AU - Clarke, Alasdair D. F.

AU - Sahraie, Arash

AU - Hunt, Amelia R

PY - 2019/5

Y1 - 2019/5

N2 - The impact of visual field deficits such as hemianopia can be mitigated by eye movements that position the visual image within the intact visual field. Effective eye movement strategies are not observed in all patients, however, and it is not known whether persistent deficits are due to injury or to pre-existing individual differences. Here we examined whether repeated exposure to a search task with rewards for good performance would lead to better eye movement strategies in healthy individuals. Participants were exposed to simulated hemianopia during a search task in five testing sessions over five consecutive days and received monetary payment for improvements in search times. With practice, most participants made saccades that went further into the blind field earlier in search, specifically under conditions where little information about the target location would be gained by inspecting the sighted field. These changes in search strategy were correlated with reduced search times. This strategy improvement also generalised to a novel task, with better performance in naming objects in a photograph under conditions of simulated hemianopia after practice with visual search compared to a control group. However, even after five days, eye movements in most participants remained far from optimal. The results demonstrate the benefits, and limitations, of practice and reward in the development of effective coping strategies for visual field deficits.

AB - The impact of visual field deficits such as hemianopia can be mitigated by eye movements that position the visual image within the intact visual field. Effective eye movement strategies are not observed in all patients, however, and it is not known whether persistent deficits are due to injury or to pre-existing individual differences. Here we examined whether repeated exposure to a search task with rewards for good performance would lead to better eye movement strategies in healthy individuals. Participants were exposed to simulated hemianopia during a search task in five testing sessions over five consecutive days and received monetary payment for improvements in search times. With practice, most participants made saccades that went further into the blind field earlier in search, specifically under conditions where little information about the target location would be gained by inspecting the sighted field. These changes in search strategy were correlated with reduced search times. This strategy improvement also generalised to a novel task, with better performance in naming objects in a photograph under conditions of simulated hemianopia after practice with visual search compared to a control group. However, even after five days, eye movements in most participants remained far from optimal. The results demonstrate the benefits, and limitations, of practice and reward in the development of effective coping strategies for visual field deficits.

KW - visual search

KW - optimality

KW - blindsight

KW - hemianopia

UR - http://www.mendeley.com/research/practicerelated-changes-eye-movement-strategy-healthy-adults-simulated-hemianopia

U2 - 10.1016/j.neuropsychologia.2018.01.020

DO - 10.1016/j.neuropsychologia.2018.01.020

M3 - Article

VL - 128

SP - 232

EP - 240

JO - Neuropsychologia

JF - Neuropsychologia

SN - 0028-3932

ER -