Description
A 1989 study investigated the effect of heredity and environment on
intelligence. Data are the IQ scores for adopted children whose
biological and adoptive parents were categorized either in the highest
or the lowest socioeconomic status category.source
Ramsey, F.L. and Schafer, D.W. (2013). The Statistical Sleuth: A
Course in Methods of Data Analysis (3rd ed), Cengage Learning.References
Capron, C. and Duyme, M. (1991). Children's IQ's and SES of
Biological and Adoptive Parents in a Balanced Cross-fostering Study,
European Bulletin of Cognitive Psychology 11(3): 323--348.