Change search
ReferencesLink to record
Permanent link

Direct link
Secular trends in cognitive test performance: Swedish conscript data 1970-1993
Umeå University, Faculty of Social Sciences, Department of Psychology.
Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Epidemiology and Global Health.
Umeå University, Faculty of Social Sciences, Centre for Population Studies (CPS).
Show others and affiliations
2013 (English)In: Intelligence, ISSN 0160-2896, E-ISSN 1873-7935, Vol. 41, no 1, 19-24 p.Article in journal (Refereed) Published
Abstract [en]

We investigated time-related patterns in levels of cognitive performance during the period from 1970 to 1993 based on data from Swedish draft boards. The conscripts, including more than a million 18-19-year old men, had taken one of two versions of the Swedish enlistment battery (SEB67; 1970-1979 or SEB80; 1980-1993), each composed of four subtests. The results revealed significant Flynn effects, with estimated gains of 1.2-1.5 IQ-units per decade. The effect seem to hold across ability levels, even though tendencies of more pronounced effects in the lower half of the ability distribution was observed. The largest gains were for visuospatial tests (Paper Form Board and Metal Folding), with little change, even slight losses during the second sub-period, for tests of verbal knowledge (Concept Discrimination and Synonyms) and a mixed pattern for a test of technical comprehension (losses followed by gains). Finally, comparisons of trends in cognitive performance and in standing height show that the gains in cognitive performance over the years from 1980 to 1993 occurred in the absence of overall gains in height which speaks against nutrition as the cause of the Flynn effects. (C) 2012 Elsevier Inc. All rights reserved.

Place, publisher, year, edition, pages
2013. Vol. 41, no 1, 19-24 p.
Keyword [en]
Flynn effects, Intelligence, Cohort effects
National Category
URN: urn:nbn:se:umu:diva-68925DOI: 10.1016/j.intell.2012.10.001ISI: 000316512700003OAI: diva2:619172
Available from: 2013-05-02 Created: 2013-04-29 Last updated: 2015-04-29Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Rönnlund, MichaelBlomstedt, YuliaNilsson, Lars-GöranWeinehall, Lars
By organisation
Department of PsychologyEpidemiology and Global HealthCentre for Population Studies (CPS)
In the same journal

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 83 hits
ReferencesLink to record
Permanent link

Direct link