Document Detail

Secular gains in fluid intelligence: evidence from the Culture-Fair intelligence test.
MedLine Citation:
PMID:  12537154     Owner:  NLM     Status:  MEDLINE    
There is no doubt about the reality of the secular increase in cognitive test scores. However, there is disagreement about a key issue: does the observed increase reflect a genuine upward trend in intelligence? Evidence from the Raven test is clear, although there are some doubts about its adequacy as a fine-grained measure of fluid intelligence. Evidence from the so-called 'method of correlated vectors' is much less clear. When a crystallized battery is considered, the results leave little doubt: the increase does not reflect gains in general intelligence. However, when a fluid battery is analysed, the increase does reflect gains in general intelligence. The present study uses one of the best available measures of fluid intelligence (the Culture-Fair intelligence test) to provide new evidence for the secular increase in fluid intelligence, beyond the findings from the Raven test and the method of correlated vectors. A total of 4498 Spanish high school students and high school graduates were tested within a time interval of 20 and 23 years, respectively. The results show that there is a clear upward trend in intelligence. Moreover, students show an average increase equivalent to 6 IQ points, while graduates show an average increase of 4 IQ points. Therefore, more selected people (graduates) show a smaller increase than less selected people (students). Some implications are discussed.
Roberto Colom; Oscar García-López
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of biosocial science     Volume:  35     ISSN:  0021-9320     ISO Abbreviation:  J Biosoc Sci     Publication Date:  2003 Jan 
Date Detail:
Created Date:  2003-01-22     Completed Date:  2003-02-12     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0177346     Medline TA:  J Biosoc Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  33-9     Citation Subset:  IM    
Universidad Autónoma de Madrid, Madrid, Spain.
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MeSH Terms
Cohort Studies
Educational Status
Intelligence Tests

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