Implicit and explicit timing in oculomotor control.

The passage of time can be estimated either explicitly, e.g. before leaving home in the morning, or implicitly, e.g. when catching a flying ball. In the present study, the latency of saccadic eye movements was used to evaluate differences between implicit and explicit timing. Humans were required to...

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Autores principales:	Ilhame Ameqrane, Pierre Pouget, Nicolas Wattiez, Roger Carpenter, Marcus Missal
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2014
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/0ded206a8af244dcbc52f0bc4056a687
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id	oai:doaj.org-article:0ded206a8af244dcbc52f0bc4056a687
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spelling	oai:doaj.org-article:0ded206a8af244dcbc52f0bc4056a6872021-11-18T08:23:40ZImplicit and explicit timing in oculomotor control.1932-620310.1371/journal.pone.0093958https://doaj.org/article/0ded206a8af244dcbc52f0bc4056a6872014-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24728140/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203The passage of time can be estimated either explicitly, e.g. before leaving home in the morning, or implicitly, e.g. when catching a flying ball. In the present study, the latency of saccadic eye movements was used to evaluate differences between implicit and explicit timing. Humans were required to make a saccade between a central and a peripheral position on a computer screen. The delay between the extinction of a central target and the appearance of an eccentric target was the independent variable that could take one out of four different values (400, 900, 1400 or 1900 ms). In target trials, the delay period lasted for one of the four durations randomly. At the end of the delay, a saccade was initiated by the appearance of an eccentric target. Cue&target trials were similar to target trials but the duration of the delay was visually cued. In probe trials, the duration of the upcoming delay was cued, but there was no eccentric target and subjects had to internally generate a saccade at the estimated end of the delay. In target and cue&target trials, the mean and variance of latency distributions decreased as delay duration increased. In cue&target trials latencies were shorter. In probe trials, the variance increased with increasing delay duration and scalar variability was observed. The major differences in saccadic latency distributions were observed between visually-guided (target and cue&target trials) and internally-generated saccades (probe trials). In target and cue&target trials the timing of the response was implicit. In probe trials, the timing of the response was internally-generated and explicitly based on the duration of the visual cue. Scalar timing was observed only during probe trials. This study supports the hypothesis that there is no ubiquitous timing system in the brain but independent timing processes active depending on task demands.Ilhame AmeqranePierre PougetNicolas WattiezRoger CarpenterMarcus MissalPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 9, Iss 4, p e93958 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ilhame Ameqrane Pierre Pouget Nicolas Wattiez Roger Carpenter Marcus Missal Implicit and explicit timing in oculomotor control.
description	The passage of time can be estimated either explicitly, e.g. before leaving home in the morning, or implicitly, e.g. when catching a flying ball. In the present study, the latency of saccadic eye movements was used to evaluate differences between implicit and explicit timing. Humans were required to make a saccade between a central and a peripheral position on a computer screen. The delay between the extinction of a central target and the appearance of an eccentric target was the independent variable that could take one out of four different values (400, 900, 1400 or 1900 ms). In target trials, the delay period lasted for one of the four durations randomly. At the end of the delay, a saccade was initiated by the appearance of an eccentric target. Cue&target trials were similar to target trials but the duration of the delay was visually cued. In probe trials, the duration of the upcoming delay was cued, but there was no eccentric target and subjects had to internally generate a saccade at the estimated end of the delay. In target and cue&target trials, the mean and variance of latency distributions decreased as delay duration increased. In cue&target trials latencies were shorter. In probe trials, the variance increased with increasing delay duration and scalar variability was observed. The major differences in saccadic latency distributions were observed between visually-guided (target and cue&target trials) and internally-generated saccades (probe trials). In target and cue&target trials the timing of the response was implicit. In probe trials, the timing of the response was internally-generated and explicitly based on the duration of the visual cue. Scalar timing was observed only during probe trials. This study supports the hypothesis that there is no ubiquitous timing system in the brain but independent timing processes active depending on task demands.
format	article
author	Ilhame Ameqrane Pierre Pouget Nicolas Wattiez Roger Carpenter Marcus Missal
author_facet	Ilhame Ameqrane Pierre Pouget Nicolas Wattiez Roger Carpenter Marcus Missal
author_sort	Ilhame Ameqrane
title	Implicit and explicit timing in oculomotor control.
title_short	Implicit and explicit timing in oculomotor control.
title_full	Implicit and explicit timing in oculomotor control.
title_fullStr	Implicit and explicit timing in oculomotor control.
title_full_unstemmed	Implicit and explicit timing in oculomotor control.
title_sort	implicit and explicit timing in oculomotor control.
publisher	Public Library of Science (PLoS)
publishDate	2014
url	https://doaj.org/article/0ded206a8af244dcbc52f0bc4056a687
work_keys_str_mv	AT ilhameameqrane implicitandexplicittiminginoculomotorcontrol AT pierrepouget implicitandexplicittiminginoculomotorcontrol AT nicolaswattiez implicitandexplicittiminginoculomotorcontrol AT rogercarpenter implicitandexplicittiminginoculomotorcontrol AT marcusmissal implicitandexplicittiminginoculomotorcontrol
_version_	1718421843799441408

Implicit and explicit timing in oculomotor control.

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