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Lynn, Richard; Van Court, Marian – Intelligence, 2004
Data from the General Social Survey (GSS) collected in the years 1990-1996 are examined for the relationship between fertility and intelligence as measured by vocabulary. The results show that the relation between fertility and intelligence has been consistently negative for successive birth cohorts from to 1900 to 1979, indicating the presence of…
Descriptors: Vocabulary Skills, Cohort Analysis, Birth Rate, Correlation