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Saccades and handedness interact to affect scene memory

Repetitive saccades benefit memory when executed before retrieval, with greatest effects for episodic memory in consistent-handers. Questions remain including how saccades affect scene memory, an important visual component of episodic memory. The present study tested how repetitive saccades affect w...

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Autores principales: Ellmore, Timothy M., Mackin, Bridget, Ng, Kenneth
Formato: Online Artículo Texto
Lenguaje:English
Publicado: PeerJ Inc. 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6240432/
https://www.ncbi.nlm.nih.gov/pubmed/30479908
http://dx.doi.org/10.7717/peerj.5969
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author Ellmore, Timothy M.
Mackin, Bridget
Ng, Kenneth
author_facet Ellmore, Timothy M.
Mackin, Bridget
Ng, Kenneth
author_sort Ellmore, Timothy M.
collection PubMed
description Repetitive saccades benefit memory when executed before retrieval, with greatest effects for episodic memory in consistent-handers. Questions remain including how saccades affect scene memory, an important visual component of episodic memory. The present study tested how repetitive saccades affect working and recognition memory for novel scenes. Handedness direction (left–right) and degree (strong/consistent vs. mixed/inconsistent) was measured by raw and absolute laterality quotients respectively from an 8-question handedness inventory completed by 111 adults. Each then performed either 30 s of repetitive horizontal saccades or fixation before or after tasks of scene working memory and scene recognition. Regression with criterion variables of overall percent correct accuracy and d-prime sensitivity showed that when saccades were made before working memory, there was better overall accuracy as a function of increased direction but not degree of handedness. Subjects who made saccades before working memory also performed worse during subsequent recognition memory, while subjects who fixated or made saccades after the working memory task performed better. Saccades made before recognition resulted in recognition accuracy that was better (Cohen’s d = 0.3729), but not significantly different from fixation before recognition. The results demonstrate saccades and handedness interact to affect scene memory with larger effects on encoding than recognition. Saccades before scene encoding in working memory are detrimental to short- and long-term memory, especially for those who are not consistently right-handed, while saccade execution before scene recognition does not appear to benefit recognition accuracy. The findings are discussed with respect to theories of interhemispheric interaction and control of visuospatial attention.
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spelling pubmed-62404322018-11-26 Saccades and handedness interact to affect scene memory Ellmore, Timothy M. Mackin, Bridget Ng, Kenneth PeerJ Neuroscience Repetitive saccades benefit memory when executed before retrieval, with greatest effects for episodic memory in consistent-handers. Questions remain including how saccades affect scene memory, an important visual component of episodic memory. The present study tested how repetitive saccades affect working and recognition memory for novel scenes. Handedness direction (left–right) and degree (strong/consistent vs. mixed/inconsistent) was measured by raw and absolute laterality quotients respectively from an 8-question handedness inventory completed by 111 adults. Each then performed either 30 s of repetitive horizontal saccades or fixation before or after tasks of scene working memory and scene recognition. Regression with criterion variables of overall percent correct accuracy and d-prime sensitivity showed that when saccades were made before working memory, there was better overall accuracy as a function of increased direction but not degree of handedness. Subjects who made saccades before working memory also performed worse during subsequent recognition memory, while subjects who fixated or made saccades after the working memory task performed better. Saccades made before recognition resulted in recognition accuracy that was better (Cohen’s d = 0.3729), but not significantly different from fixation before recognition. The results demonstrate saccades and handedness interact to affect scene memory with larger effects on encoding than recognition. Saccades before scene encoding in working memory are detrimental to short- and long-term memory, especially for those who are not consistently right-handed, while saccade execution before scene recognition does not appear to benefit recognition accuracy. The findings are discussed with respect to theories of interhemispheric interaction and control of visuospatial attention. PeerJ Inc. 2018-11-15 /pmc/articles/PMC6240432/ /pubmed/30479908 http://dx.doi.org/10.7717/peerj.5969 Text en ©2018 Ellmore et al. http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.
spellingShingle Neuroscience
Ellmore, Timothy M.
Mackin, Bridget
Ng, Kenneth
Saccades and handedness interact to affect scene memory
title Saccades and handedness interact to affect scene memory
title_full Saccades and handedness interact to affect scene memory
title_fullStr Saccades and handedness interact to affect scene memory
title_full_unstemmed Saccades and handedness interact to affect scene memory
title_short Saccades and handedness interact to affect scene memory
title_sort saccades and handedness interact to affect scene memory
topic Neuroscience
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6240432/
https://www.ncbi.nlm.nih.gov/pubmed/30479908
http://dx.doi.org/10.7717/peerj.5969
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