Advertisement

Behavior Genetics

, Volume 35, Issue 2, pp 211–217 | Cite as

Reformulating and Simplifying the DF Analysis Model

  • Joseph Lee Rodgers
  • Hans-Peter Kohler
Article

Abstract

DeFries-Fulker (DF) Analysis for unselected populations is reformulated as a no-intercept model with centered variables and only two independent variables. The reformulation serves three purposes. First, the original formulation implicitly estimated two different values for c 2 and two values for h 2 . The new formulation resolves this ambiguity. Second, because the original formulation estimated h 2 with the coefficient from a regression-interaction term, whether to center the interaction variables was unclear. The new formulation explicitly resolves this issue. Finally, the new formulation estimates fewer parameters, and therefore improves estimation efficiency and statistical power.

Keywords

Biometrical modeling DF analysis heritability estimation 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Aiken, L. S., West, S. G. 1991Multiple regression:testing and interpreting interactionsSageNewbury Park, CAGoogle Scholar
  2. Buster, M., Rodgers, J. L. 2000Genetic and environmental influences on alcohol use: DF analysis of NLSY kinship dataJ. Biosocial Sci.32145168Google Scholar
  3. Christensen, K., Basso, O., Kyvik, K. O., Juul, S., Boldsen, J., Vaupel, J., Olsen, J. 1998Fecundability of female twinsEpidemiology9189192PubMedGoogle Scholar
  4. Cherny, S. S., DeFries, J. C., Fulker, D. W. 1992Multiple regression analysis of twin data: A model-fitting approachBehav. Genet.22498497Google Scholar
  5. Cherny, S. S., Cardon, L. R., Fulker, D. W., DeFries, J. C. 1992Differential heritability across levels of cognitive abilityBehav. Genet.22153162PubMedGoogle Scholar
  6. Cyphers, L. H., Phillips, K., Fulker, D. W., Mrazek, D. A. 1990Twin temperament during the transition from infancy to early childhoodJ. Am. Acad. Child Adolescent Psychiatr.29392397CrossRefGoogle Scholar
  7. DeFries, J., Fulker, D. 1985Multiple regression analysis of twin dataBehav. Genet.1546773PubMedGoogle Scholar
  8. DeFries, J., Fulker, D. 1988Multiple regression analysis of twin data:Etiology of deviant scores versus individual differencesActa Genet. Med. Gemellol (Roma).37205216Google Scholar
  9. Hansen, L. 1982Large sample properties of generalized method of moments estimatorsEconometrica5010291054zbMATHMathSciNetGoogle Scholar
  10. Kohler, H.-P., Rodgers, J. L. 1999DF Analyses of binary, orderedand censored variables using probit and tobit approachesBehav. Genet.29221232Google Scholar
  11. Kohler, H.-P., Rodgers, J. L. 2001DF-Analysis of heritability with double-entry twin data: Asymptotic standard errors and efficient estimationBehav. Genet.31179192PubMedGoogle Scholar
  12. Kohler, H.-P, Rodgers, J. L., Christensen, K. 1999Is fertility behavior in our genes? Findings from a Danish twin studyPopul. Dev. Rev.25253288Google Scholar
  13. Kohler, H.-P, Rodgers, J. L., Christensen, K. 2002Between nurture and nature: The shifting determinants of female fertility in Danish twin cohortsSocial Biol.49218248Google Scholar
  14. LaBuda, M. C., DeFries, J. C. 1990Genetic etiology of reading disability: evidence from a twin studyPavlidis, G. T. eds. Perspectives on dyslexiaVol. 1Wiley & SonsNew YorkGoogle Scholar
  15. Plomin, R. 1991Genetic risk and psychosocial disorders:Links between the normal and abnormalRutter, M.Casaer, P. eds. Biological risk factors for psychosocial disordersCambridge University PressCambridgeEngland101138Google Scholar
  16. Rodgers, J. L., Buster, M., Rowe, D. C. 2001Genetic and environmental influences on delinquency: DF Analysis of NLSY kinship dataJ. Quantitative Criminol.17145168Google Scholar
  17. Rodgers, J. L., Kohler, H.-P., Kyvik, K., Christensen, K. 2000Behavior genetic modeling of human fertility: Findings from a contemporary Danish twin studyDemography382942Google Scholar
  18. Rodgers, J. L., McGue, M. 1994A simple algebraic demonstration of the validity of DeFries-Fulker Analysis in unselected samples with multiple kinship levelsBehav. Genet.24259262PubMedGoogle Scholar
  19. Rodgers, J. L., Rowe, D. C. 1987IQ similarity in twins, siblings, half-siblings, cousins, and random pairsIntelligence11199206Google Scholar
  20. Rodgers, J. L., Rowe, D. C., Buster, M. 1999Naturenurtureand first sexual intercourse in the USA: Fitting behavioral genetic models to NLSY kinship dataJ. Biosocial Sci.312941Google Scholar
  21. Rodgers, J. L., Rowe, D. C., Li, C. 1994Beyond nature versus nurture: DF Analysis of nonshared influences on problem behaviorsDev. Psychol.30374384Google Scholar
  22. Rodgers, J. L., Rowe, D. C., May, K. 1994DF analysis of NLSY IQ/Achievement data:nonshared environmental influencesIntelligence19157177Google Scholar
  23. Waller, N. B. 1994A DeFries and Fulker regression model for genetic nonadditivityBehav. Genet.24149153PubMedGoogle Scholar

Copyright information

© Springer Science+Business Media, Inc. 2005

Authors and Affiliations

  1. 1.Department of PsychologyUniversity of OklahomaNormanUSA
  2. 2.Department of SociologyUniversity of PennsylvaniaPhiladelphia

Personalised recommendations