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ERIC Number: EJ784467
Record Type: Journal
Publication Date: 2008
Pages: 9
Abstractor: Author
Reference Count: 0
ISSN: ISSN-0160-2896
The Decline of the World's IQ
Lynn, Richard; Harvey, John
Intelligence, v36 n2 p112-120 Mar-Apr 2008
Dysgenic fertility means that there is a negative correlation between intelligence and number of children. Its presence during the last century has been demonstrated in several countries. We show here that there is dysgenic fertility in the world population quantified by a correlation of--0.73 between IQ and fertility across nations. It is estimated that the effect of this has been a decline in the world's genotypic IQ of 0.86 IQ points for the years 1950-2000. A further decline of 1.28 IQ points in the world's genotypic IQ is projected for the years 2000-2050. In the period 1950-2000 this decline has been compensated for by a rise in phenotypic intelligence known as the Flynn Effect, but recent studies in four economically developed countries have found that this has now ceased or gone into reverse. It seems probable that this "negative Flynn Effect" will spread to economically developing countries and the whole world will move into a period of declining genotypic and phenotypic intelligence. It is possible that "the new eugenics" of biotechnology may evolve to counteract dysgenic fertility.
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A