The cognitive abilities associated with verbal fluency task performance differ across fluency variants and age groups in healthy young and old adults

Renerus-John Stolwyk, Bavani Bannirchelvam, Claudine Maree Kraan, Katrina Simpson

Research output: Contribution to journalArticleResearchpeer-review

22 Citations (Scopus)

Abstract

Despite their widespread use in research and clinical practice, the cognitive abilities purportedly assessed by different verbal fluency task variants remain unclear and may vary across different healthy and clinical populations. The overarching aim of this study was to identify which cognitive abilities contribute to phonemic, semantic, excluded letter, and alternating verbal fluency tasks and whether these contributions differ across younger and older healthy adults. Method: Ninety-six younger (18-36 years) and 83 older (65-87 years) healthy participants completed measures of estimated verbal intelligence, semantic retrieval, processing speed, working memory, and inhibitory control, in addition to phonemic, semantic, excluded letter, and alternating fluency tasks. Eight hierarchical multiple regressions were conducted across the four fluency variants and two age groups to identify which cognitive variables uniquely contributed to these fluency tasks. Results: In the younger group, verbal intelligence and processing speed contributed to phonemic fluency, semantic retrieval to semantic fluency, processing speed and working memory to excluded letter fluency, and semantic retrieval to alternating fluency. In contrast, in the older group, verbal intelligence contributed to phonemic fluency, no cognitive variables contributed to semantic fluency, inhibition to excluded letter fluency, and verbal intelligence to alternating fluency. Conclusions: Our findings highlight that both lower and higher order cognitive skills contribute to verbal fluency tasks; however, these contributions vary considerably across fluency variants and age groups. The heterogeneity of cognitive determinants of verbal fluency, across variants and age, may explain why older people performed less proficiently on semantic and excluded letter fluency tasks while no age effects were found for phonemic and alternating fluency. Interpretation of verbal fluency performances need to be tailored according to which verbal fluency variant and age group are used
Original languageEnglish
Pages (from-to)70 - 83
Number of pages14
JournalJournal of Clinical and Experimental Neuropsychology
Volume37
Issue number1
DOIs
Publication statusPublished - 2015

Cite this

@article{992e2c47fc994721859150eb3470b6d1,
title = "The cognitive abilities associated with verbal fluency task performance differ across fluency variants and age groups in healthy young and old adults",
abstract = "Despite their widespread use in research and clinical practice, the cognitive abilities purportedly assessed by different verbal fluency task variants remain unclear and may vary across different healthy and clinical populations. The overarching aim of this study was to identify which cognitive abilities contribute to phonemic, semantic, excluded letter, and alternating verbal fluency tasks and whether these contributions differ across younger and older healthy adults. Method: Ninety-six younger (18-36 years) and 83 older (65-87 years) healthy participants completed measures of estimated verbal intelligence, semantic retrieval, processing speed, working memory, and inhibitory control, in addition to phonemic, semantic, excluded letter, and alternating fluency tasks. Eight hierarchical multiple regressions were conducted across the four fluency variants and two age groups to identify which cognitive variables uniquely contributed to these fluency tasks. Results: In the younger group, verbal intelligence and processing speed contributed to phonemic fluency, semantic retrieval to semantic fluency, processing speed and working memory to excluded letter fluency, and semantic retrieval to alternating fluency. In contrast, in the older group, verbal intelligence contributed to phonemic fluency, no cognitive variables contributed to semantic fluency, inhibition to excluded letter fluency, and verbal intelligence to alternating fluency. Conclusions: Our findings highlight that both lower and higher order cognitive skills contribute to verbal fluency tasks; however, these contributions vary considerably across fluency variants and age groups. The heterogeneity of cognitive determinants of verbal fluency, across variants and age, may explain why older people performed less proficiently on semantic and excluded letter fluency tasks while no age effects were found for phonemic and alternating fluency. Interpretation of verbal fluency performances need to be tailored according to which verbal fluency variant and age group are used",
author = "Renerus-John Stolwyk and Bavani Bannirchelvam and Kraan, {Claudine Maree} and Katrina Simpson",
year = "2015",
doi = "10.1080/13803395.2014.988125",
language = "English",
volume = "37",
pages = "70 -- 83",
journal = "Journal of Clinical and Experimental Neuropsychology",
issn = "1380-3395",
publisher = "Taylor & Francis",
number = "1",

}

The cognitive abilities associated with verbal fluency task performance differ across fluency variants and age groups in healthy young and old adults. / Stolwyk, Renerus-John; Bannirchelvam, Bavani; Kraan, Claudine Maree; Simpson, Katrina.

In: Journal of Clinical and Experimental Neuropsychology, Vol. 37, No. 1, 2015, p. 70 - 83.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - The cognitive abilities associated with verbal fluency task performance differ across fluency variants and age groups in healthy young and old adults

AU - Stolwyk, Renerus-John

AU - Bannirchelvam, Bavani

AU - Kraan, Claudine Maree

AU - Simpson, Katrina

PY - 2015

Y1 - 2015

N2 - Despite their widespread use in research and clinical practice, the cognitive abilities purportedly assessed by different verbal fluency task variants remain unclear and may vary across different healthy and clinical populations. The overarching aim of this study was to identify which cognitive abilities contribute to phonemic, semantic, excluded letter, and alternating verbal fluency tasks and whether these contributions differ across younger and older healthy adults. Method: Ninety-six younger (18-36 years) and 83 older (65-87 years) healthy participants completed measures of estimated verbal intelligence, semantic retrieval, processing speed, working memory, and inhibitory control, in addition to phonemic, semantic, excluded letter, and alternating fluency tasks. Eight hierarchical multiple regressions were conducted across the four fluency variants and two age groups to identify which cognitive variables uniquely contributed to these fluency tasks. Results: In the younger group, verbal intelligence and processing speed contributed to phonemic fluency, semantic retrieval to semantic fluency, processing speed and working memory to excluded letter fluency, and semantic retrieval to alternating fluency. In contrast, in the older group, verbal intelligence contributed to phonemic fluency, no cognitive variables contributed to semantic fluency, inhibition to excluded letter fluency, and verbal intelligence to alternating fluency. Conclusions: Our findings highlight that both lower and higher order cognitive skills contribute to verbal fluency tasks; however, these contributions vary considerably across fluency variants and age groups. The heterogeneity of cognitive determinants of verbal fluency, across variants and age, may explain why older people performed less proficiently on semantic and excluded letter fluency tasks while no age effects were found for phonemic and alternating fluency. Interpretation of verbal fluency performances need to be tailored according to which verbal fluency variant and age group are used

AB - Despite their widespread use in research and clinical practice, the cognitive abilities purportedly assessed by different verbal fluency task variants remain unclear and may vary across different healthy and clinical populations. The overarching aim of this study was to identify which cognitive abilities contribute to phonemic, semantic, excluded letter, and alternating verbal fluency tasks and whether these contributions differ across younger and older healthy adults. Method: Ninety-six younger (18-36 years) and 83 older (65-87 years) healthy participants completed measures of estimated verbal intelligence, semantic retrieval, processing speed, working memory, and inhibitory control, in addition to phonemic, semantic, excluded letter, and alternating fluency tasks. Eight hierarchical multiple regressions were conducted across the four fluency variants and two age groups to identify which cognitive variables uniquely contributed to these fluency tasks. Results: In the younger group, verbal intelligence and processing speed contributed to phonemic fluency, semantic retrieval to semantic fluency, processing speed and working memory to excluded letter fluency, and semantic retrieval to alternating fluency. In contrast, in the older group, verbal intelligence contributed to phonemic fluency, no cognitive variables contributed to semantic fluency, inhibition to excluded letter fluency, and verbal intelligence to alternating fluency. Conclusions: Our findings highlight that both lower and higher order cognitive skills contribute to verbal fluency tasks; however, these contributions vary considerably across fluency variants and age groups. The heterogeneity of cognitive determinants of verbal fluency, across variants and age, may explain why older people performed less proficiently on semantic and excluded letter fluency tasks while no age effects were found for phonemic and alternating fluency. Interpretation of verbal fluency performances need to be tailored according to which verbal fluency variant and age group are used

UR - http://www.tandfonline.com/doi/pdf/10.1080/13803395.2014.988125

U2 - 10.1080/13803395.2014.988125

DO - 10.1080/13803395.2014.988125

M3 - Article

VL - 37

SP - 70

EP - 83

JO - Journal of Clinical and Experimental Neuropsychology

JF - Journal of Clinical and Experimental Neuropsychology

SN - 1380-3395

IS - 1

ER -