Examination of the processing speed account in a population-based longitudinal study with narrow age cohort design
2008 (English)In: Scandinavian Journal of Psychology, ISSN 0036-5564, E-ISSN 1467-9450, Vol. 49, no 5, 419-428 p.Article in journal (Refereed) Published
The processing speed account suggests that general slowing of mental processing speed results in an overall decline, especially age-related decline, in other cognitive domains. Support for the speed account comes mainly from cross-sectional studies with participants that vary in age (age-heterogeneous samples). This study investigated how well variations in processing speed predict change of episodic recall in a longitudinal framework and examined with the Narrow Age Cohort (NAC) design. Data were obtained from Betula, a population-based longitudinal study. Both 5-year (n= 490; Time 3 – Time 4) and 10-year follow-up results (n= 608; Time 1 – Time 3) were used. In both samples, which were subjected to prospective dementia screening, we found considerably weaker associations in longitudinal data compared to cross-sectional, and also weaker associations in age-homogeneous than in age-heterogeneous samples. The results provide little support for the speed account.
Place, publisher, year, edition, pages
2008. Vol. 49, no 5, 419-428 p.
cognitive aging, memory, processing speed, longitudinal, cohort
IdentifiersURN: urn:nbn:se:su:diva-15081DOI: 10.1111/j.1467-9450.2008.00663.xISI: 000259228400004OAI: oai:DiVA.org:su-15081DiVA: diva2:181601
The Betula Longitudinal Project is supported by the Bank of Sweden Tercentenary Foundation (1988-0082:17), Swedish Council for Planning and Coordination of Research (D1988-0092, D1989-0115, D1990-0074, D1991-0258, D1992-0143, D1997-0756, D1997-1841, D1999-0739, and B1999-474), Swedish Council for Research in the Humanities and Social Sciences (F377/1988-2000), and the Swedish Council for Social Research (1988-1990:88-0082, and 311/1991-2000). Åke Wahlin was funded by a grant from the Swedish Council for Research in the Humanities and Social Sciences (Dnr 421-2002-2575). Ola Sternäng was supported by grants from the Royal Swedish Academy of Sciences and from the Foundation Lars Hiertas Minne.2008-11-202008-11-202010-11-30Bibliographically approved