Visual fixations rather than saccades dominate the developmental eye movement test

Abstract When children have visual and/or oculomotor deficits, early diagnosis is critical for rehabilitation. The developmental eye movement (DEM) test is a visual-verbal number naming test that aims to measure oculomotor dysfunction in children by comparing scores on a horizontal and vertical subt...

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Autores principales:	Nouk Tanke, Annemiek D. Barsingerhorn, F. Nienke Boonstra, Jeroen Goossens
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8efbc2052c5048bfaf72fcd49b8067b8
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spelling	oai:doaj.org-article:8efbc2052c5048bfaf72fcd49b8067b82021-12-02T14:01:23ZVisual fixations rather than saccades dominate the developmental eye movement test10.1038/s41598-020-80870-52045-2322https://doaj.org/article/8efbc2052c5048bfaf72fcd49b8067b82021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-80870-5https://doaj.org/toc/2045-2322Abstract When children have visual and/or oculomotor deficits, early diagnosis is critical for rehabilitation. The developmental eye movement (DEM) test is a visual-verbal number naming test that aims to measure oculomotor dysfunction in children by comparing scores on a horizontal and vertical subtest. However, empirical comparison of oculomotor behavior during the two subtests is missing. Here, we measured eye movements of healthy children while they performed a digital version of the DEM. In addition, we measured visual processing speed using the Speed Acuity test. We found that parameters of saccade behavior, such as the number, amplitude, and direction of saccades, correlated with performance on the horizontal, but not the vertical subtest. However, the time spent on making saccades was very short compared to the time spent on number fixations and the total time needed for either subtest. Fixation durations correlated positively with performance on both subtests and co-varied tightly with visual processing speed. Accordingly, horizontal and vertical DEM scores showed a strong positive correlation with visual processing speed. We therefore conclude that the DEM is not suitable to measure saccade behavior, but can be a useful indicator of visual-verbal naming skills, visual processing speed, and other cognitive factors of clinical relevance.Nouk TankeAnnemiek D. BarsingerhornF. Nienke BoonstraJeroen GoossensNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Nouk Tanke Annemiek D. Barsingerhorn F. Nienke Boonstra Jeroen Goossens Visual fixations rather than saccades dominate the developmental eye movement test
description	Abstract When children have visual and/or oculomotor deficits, early diagnosis is critical for rehabilitation. The developmental eye movement (DEM) test is a visual-verbal number naming test that aims to measure oculomotor dysfunction in children by comparing scores on a horizontal and vertical subtest. However, empirical comparison of oculomotor behavior during the two subtests is missing. Here, we measured eye movements of healthy children while they performed a digital version of the DEM. In addition, we measured visual processing speed using the Speed Acuity test. We found that parameters of saccade behavior, such as the number, amplitude, and direction of saccades, correlated with performance on the horizontal, but not the vertical subtest. However, the time spent on making saccades was very short compared to the time spent on number fixations and the total time needed for either subtest. Fixation durations correlated positively with performance on both subtests and co-varied tightly with visual processing speed. Accordingly, horizontal and vertical DEM scores showed a strong positive correlation with visual processing speed. We therefore conclude that the DEM is not suitable to measure saccade behavior, but can be a useful indicator of visual-verbal naming skills, visual processing speed, and other cognitive factors of clinical relevance.
format	article
author	Nouk Tanke Annemiek D. Barsingerhorn F. Nienke Boonstra Jeroen Goossens
author_facet	Nouk Tanke Annemiek D. Barsingerhorn F. Nienke Boonstra Jeroen Goossens
author_sort	Nouk Tanke
title	Visual fixations rather than saccades dominate the developmental eye movement test
title_short	Visual fixations rather than saccades dominate the developmental eye movement test
title_full	Visual fixations rather than saccades dominate the developmental eye movement test
title_fullStr	Visual fixations rather than saccades dominate the developmental eye movement test
title_full_unstemmed	Visual fixations rather than saccades dominate the developmental eye movement test
title_sort	visual fixations rather than saccades dominate the developmental eye movement test
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/8efbc2052c5048bfaf72fcd49b8067b8
work_keys_str_mv	AT nouktanke visualfixationsratherthansaccadesdominatethedevelopmentaleyemovementtest AT annemiekdbarsingerhorn visualfixationsratherthansaccadesdominatethedevelopmentaleyemovementtest AT fnienkeboonstra visualfixationsratherthansaccadesdominatethedevelopmentaleyemovementtest AT jeroengoossens visualfixationsratherthansaccadesdominatethedevelopmentaleyemovementtest
_version_	1718392155934818304

Visual fixations rather than saccades dominate the developmental eye movement test

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