Showing posts with label IQ scores. Show all posts
Showing posts with label IQ scores. Show all posts
Friday, October 21, 2011
IQ more variable than previously thought
It has generally been thought that IQ is fairly stable from the teen years onwards. Non-cognitive ability however has been seen as more malleable & this idea has featured in Jim Heckman's work especially since non-cognitive ability seems to be quite important for labour market outcomes. However based on this study it now seems that IQ varies much more than previously thought for teenagers. What is not clear is whether it can be actively increased by interventions.
Wednesday, March 02, 2011
Tuesday, September 15, 2009
Like Father, Like Son? A Note on the Intergenerational Transmission of IQ Scores
Like Father, Like Son? A Note on the Intergenerational Transmission of IQ Scores
by Sandra E. Black, Paul Devereux, Kjell G. Salvanes
published in: Economics Letters, 2009, 105 (1), 138-140
Abstract:
More able parents tend to have more able children. While few would question the validity of this statement, there is little large-scale evidence on the intergenerational transmission of IQ scores. Using a larger and more comprehensive dataset than previous work, we are able to estimate the intergenerational correlation in IQ scores, examining not just average correlations but also how this relationship varies for different subpopulations. We find that there is substantial intergenerational transmission of IQ scores; an increase in father’s IQ at age 18 of 10% is associated with a 3.2% increase in son’s IQ at the same age. This relationship holds true no matter how we break the data. This effect is much larger than our estimated elasticity of intergenerational transmission of income of approximately .2.
by Sandra E. Black, Paul Devereux, Kjell G. Salvanes
published in: Economics Letters, 2009, 105 (1), 138-140
Abstract:
More able parents tend to have more able children. While few would question the validity of this statement, there is little large-scale evidence on the intergenerational transmission of IQ scores. Using a larger and more comprehensive dataset than previous work, we are able to estimate the intergenerational correlation in IQ scores, examining not just average correlations but also how this relationship varies for different subpopulations. We find that there is substantial intergenerational transmission of IQ scores; an increase in father’s IQ at age 18 of 10% is associated with a 3.2% increase in son’s IQ at the same age. This relationship holds true no matter how we break the data. This effect is much larger than our estimated elasticity of intergenerational transmission of income of approximately .2.
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