Double vision: Reply to Freese and Powell

Allan V. Horwitz, Tami M. Videon, Mark F. Schmitz, Diane Davis

Research output: Contribution to journalReview articlepeer-review

7 Scopus citations


Freese and Powell make a number of critiques of the theoretical assumptions, statistical methods, and use of variables in our paper, which raises questions about the typical use of the equal environments assumption in twin research. We do not find that any of their critiques modify our conclusion that the equal environments assumption cannot be taken for granted but must be subjected to empirical testing. We hope that our paper and the resulting exchange will lead sociologists to become more actively involved in the debate regarding the extent of genetic and environmental influences on social behaviors.

Original languageEnglish (US)
Pages (from-to)136-141
Number of pages6
JournalJournal of health and social behavior
Issue number2
StatePublished - Jun 2003

All Science Journal Classification (ASJC) codes

  • Social Psychology
  • Public Health, Environmental and Occupational Health


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