ERIC Number: EJ729962
Record Type: Journal
Publication Date: 2004
Reference Count: N/A
New Evidence of Dysgenic Fertility for Intelligence in the United States
Lynn, Richard; Van Court, Marian
Intelligence, v32 n2 p193-201 Mar-Apr 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 dysgenic fertility for all of the 20th century studied thus far. The most recent cohort for which fertility can be regarded as complete is that born in the years 1940-1949. In this cohort, the decline of genotypic intelligence arising from the negative association between intelligence and fertility is estimated at 0.90 IQ points per generation. The decline of genotypic intelligence of Whites is estimated at 0.75 IQ points a generation.
Descriptors: Vocabulary Skills, Cohort Analysis, Birth Rate, Correlation, Intelligence Quotient, Genetics, Intelligence Differences, Whites, National Surveys, Intelligence
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Authoring Institution: N/A
Identifiers - Location: United States
Identifiers - Assessments and Surveys: General Social Survey