Age differences in intra-individual variability in simple and choice reaction time: systematic review and meta-analysis.

<h4>Background</h4>Intra-individual variability in reaction time (RT IIV) is considered to be an index of central nervous system functioning. Such variability is elevated in neurodegenerative diseases or following traumatic brain injury. It has also been suggested to increase with age in...

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Autores principales:	Dominika Dykiert, Geoff Der, John M Starr, Ian J Deary
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2012
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/eaf989700d2a4600bc65384582a8c704
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spelling	oai:doaj.org-article:eaf989700d2a4600bc65384582a8c7042021-11-18T08:12:25ZAge differences in intra-individual variability in simple and choice reaction time: systematic review and meta-analysis.1932-620310.1371/journal.pone.0045759https://doaj.org/article/eaf989700d2a4600bc65384582a8c7042012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23071524/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Background</h4>Intra-individual variability in reaction time (RT IIV) is considered to be an index of central nervous system functioning. Such variability is elevated in neurodegenerative diseases or following traumatic brain injury. It has also been suggested to increase with age in healthy ageing.<h4>Objectives</h4>To investigate and quantify age differences in RT IIV in healthy ageing; to examine the effect of different tasks and procedures; to compare raw and mean-adjusted measures of RT IIV.<h4>Data sources</h4>Four electronic databases: PsycINFO, Medline, Web of Science and EMBASE, and hand searching of reference lists of relevant studies.<h4>Study eligibility</h4>English language journal articles, books or book chapters, containing quantitative empirical data on simple and/or choice RT IIV. Samples had to include younger (under 60 years) and older (60 years and above) human adults.<h4>Study appraisal and synthesis</h4>Studies were evaluated in terms of sample representativeness and data treatment. Relevant data were extracted, using a specially-designed form, from the published report or obtained directly from the study authors. Age-group differences in raw and RT-mean-adjusted measures of simple and choice RT IIV were quantified using random effects meta-analyses.<h4>Results</h4>Older adults (60+ years) had greater RT IIV than younger (20-39) and middle-aged (40-59) adults. Age effects were larger in choice RT tasks than in simple RT tasks. For all measures of RT IIV, effect sizes were larger for the comparisons between older and younger adults than between older and middle-aged adults, indicating that the age-related increases in RT IIV are not limited to old age. Effect sizes were also larger for raw than for RT-mean-adjusted RT IIV measures.<h4>Conclusions</h4>RT IIV is greater among older adults. Some (but not all) of the age-related increases in RT IIV are accounted for by the increased RT means.Dominika DykiertGeoff DerJohn M StarrIan J DearyPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 10, p e45759 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Dominika Dykiert Geoff Der John M Starr Ian J Deary Age differences in intra-individual variability in simple and choice reaction time: systematic review and meta-analysis.
description	<h4>Background</h4>Intra-individual variability in reaction time (RT IIV) is considered to be an index of central nervous system functioning. Such variability is elevated in neurodegenerative diseases or following traumatic brain injury. It has also been suggested to increase with age in healthy ageing.<h4>Objectives</h4>To investigate and quantify age differences in RT IIV in healthy ageing; to examine the effect of different tasks and procedures; to compare raw and mean-adjusted measures of RT IIV.<h4>Data sources</h4>Four electronic databases: PsycINFO, Medline, Web of Science and EMBASE, and hand searching of reference lists of relevant studies.<h4>Study eligibility</h4>English language journal articles, books or book chapters, containing quantitative empirical data on simple and/or choice RT IIV. Samples had to include younger (under 60 years) and older (60 years and above) human adults.<h4>Study appraisal and synthesis</h4>Studies were evaluated in terms of sample representativeness and data treatment. Relevant data were extracted, using a specially-designed form, from the published report or obtained directly from the study authors. Age-group differences in raw and RT-mean-adjusted measures of simple and choice RT IIV were quantified using random effects meta-analyses.<h4>Results</h4>Older adults (60+ years) had greater RT IIV than younger (20-39) and middle-aged (40-59) adults. Age effects were larger in choice RT tasks than in simple RT tasks. For all measures of RT IIV, effect sizes were larger for the comparisons between older and younger adults than between older and middle-aged adults, indicating that the age-related increases in RT IIV are not limited to old age. Effect sizes were also larger for raw than for RT-mean-adjusted RT IIV measures.<h4>Conclusions</h4>RT IIV is greater among older adults. Some (but not all) of the age-related increases in RT IIV are accounted for by the increased RT means.
format	article
author	Dominika Dykiert Geoff Der John M Starr Ian J Deary
author_facet	Dominika Dykiert Geoff Der John M Starr Ian J Deary
author_sort	Dominika Dykiert
title	Age differences in intra-individual variability in simple and choice reaction time: systematic review and meta-analysis.
title_short	Age differences in intra-individual variability in simple and choice reaction time: systematic review and meta-analysis.
title_full	Age differences in intra-individual variability in simple and choice reaction time: systematic review and meta-analysis.
title_fullStr	Age differences in intra-individual variability in simple and choice reaction time: systematic review and meta-analysis.
title_full_unstemmed	Age differences in intra-individual variability in simple and choice reaction time: systematic review and meta-analysis.
title_sort	age differences in intra-individual variability in simple and choice reaction time: systematic review and meta-analysis.
publisher	Public Library of Science (PLoS)
publishDate	2012
url	https://doaj.org/article/eaf989700d2a4600bc65384582a8c704
work_keys_str_mv	AT dominikadykiert agedifferencesinintraindividualvariabilityinsimpleandchoicereactiontimesystematicreviewandmetaanalysis AT geoffder agedifferencesinintraindividualvariabilityinsimpleandchoicereactiontimesystematicreviewandmetaanalysis AT johnmstarr agedifferencesinintraindividualvariabilityinsimpleandchoicereactiontimesystematicreviewandmetaanalysis AT ianjdeary agedifferencesinintraindividualvariabilityinsimpleandchoicereactiontimesystematicreviewandmetaanalysis
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Age differences in intra-individual variability in simple and choice reaction time: systematic review and meta-analysis.

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