Differential heritability across levels of cognitive ability

S. S. Cherny*, L. R. Cardon, D. W. Fulker, J. C. DeFries

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Differences in heritability and shared environmentality across levels of cognitive ability were assessed in a sample of 264 twin pairs tested at 1 year of age and in subsets tested at 2 and 3 years. Using an extension of the DF multiple regression methodology for analyzing twin data, no evidence was found for a linear or quadratic effect of level of cognitive ability on estimates of heritability or shared environmentality.

Original languageEnglish
Pages (from-to)153-162
Number of pages10
JournalBehavior Genetics
Issue number2
StatePublished - Mar 1992
Externally publishedYes


  • cognitive ability
  • differential heritability
  • differential shared environmentality
  • twins


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