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Up to speed : Birth cohort effects observed for speed of processing in older adults: Data from the Good Ageing in Skåne population study

Overton, Marieclaire LU ; Pihlsgård, Mats LU and Elmståhl, Sölve LU (2018) In Intelligence1970-01-01+01:00 67. p.33-43
Abstract

Neuropsychological test-based norms are vital for accurate assessment of older adults’ level of cognition. Hence, it is important that these scores are not conflated with birth cohort effects. With data drawn from the Swedish Good Ageing in Skåne (GÅS) population study, this study examined birth cohort effects on test scores measuring several cognitive domains. A time-lag design with three distinct birth years, separated by 5–7 years, and with two age-matched samples of older participants, was used. Participants aged 60 were born 1942–1955 and those aged 81 were born 1920–1933. Results reveal significant (p < 0.05) birth cohort effects on speed of processing, episodic memory, attention, executive functioning and vocabulary test... (More)

Neuropsychological test-based norms are vital for accurate assessment of older adults’ level of cognition. Hence, it is important that these scores are not conflated with birth cohort effects. With data drawn from the Swedish Good Ageing in Skåne (GÅS) population study, this study examined birth cohort effects on test scores measuring several cognitive domains. A time-lag design with three distinct birth years, separated by 5–7 years, and with two age-matched samples of older participants, was used. Participants aged 60 were born 1942–1955 and those aged 81 were born 1920–1933. Results reveal significant (p < 0.05) birth cohort effects on speed of processing, episodic memory, attention, executive functioning and vocabulary test scores. Effect sizes for specific cohort comparisons (e.g. 1942–43 vs. 1947–48) were modest (Cohen's d = 0.19–0.43). When adjusting for participants’ level of education classified in years or in categories, birth cohort effects on test scores remained stable. Findings support the presence of birth cohort effects in samples of older adults, showing that participants’ level of education cannot fully account for these effects. Thus, neuropsychological test scores should routinely be examined for birth cohort effects in cross-sectional data for a correct assessment of cognition.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Ageing, Birth cohort, Cohort, Flynn effects, Speed of processing
in
Intelligence1970-01-01+01:00
volume
67
pages
11 pages
publisher
Elsevier
external identifiers
  • scopus:85056456021
ISSN
0160-2896
DOI
10.1016/j.intell.2018.01.002
language
English
LU publication?
yes
id
4389ca83-977d-4ca0-ba03-63916fbe8210
date added to LUP
2018-11-28 10:18:03
date last changed
2019-02-20 11:38:04
@article{4389ca83-977d-4ca0-ba03-63916fbe8210,
  abstract     = {<p>Neuropsychological test-based norms are vital for accurate assessment of older adults’ level of cognition. Hence, it is important that these scores are not conflated with birth cohort effects. With data drawn from the Swedish Good Ageing in Skåne (GÅS) population study, this study examined birth cohort effects on test scores measuring several cognitive domains. A time-lag design with three distinct birth years, separated by 5–7 years, and with two age-matched samples of older participants, was used. Participants aged 60 were born 1942–1955 and those aged 81 were born 1920–1933. Results reveal significant (p &lt; 0.05) birth cohort effects on speed of processing, episodic memory, attention, executive functioning and vocabulary test scores. Effect sizes for specific cohort comparisons (e.g. 1942–43 vs. 1947–48) were modest (Cohen's d = 0.19–0.43). When adjusting for participants’ level of education classified in years or in categories, birth cohort effects on test scores remained stable. Findings support the presence of birth cohort effects in samples of older adults, showing that participants’ level of education cannot fully account for these effects. Thus, neuropsychological test scores should routinely be examined for birth cohort effects in cross-sectional data for a correct assessment of cognition.</p>},
  author       = {Overton, Marieclaire and Pihlsgård, Mats and Elmståhl, Sölve},
  issn         = {0160-2896},
  keyword      = {Ageing,Birth cohort,Cohort,Flynn effects,Speed of processing},
  language     = {eng},
  pages        = {33--43},
  publisher    = {Elsevier},
  series       = {Intelligence1970-01-01+01:00},
  title        = {Up to speed : Birth cohort effects observed for speed of processing in older adults: Data from the Good Ageing in Skåne population study},
  url          = {http://dx.doi.org/10.1016/j.intell.2018.01.002},
  volume       = {67},
  year         = {2018},
}