Document Detail

Separated twins and the genetics of personality differences: a critique.
MedLine Citation:
PMID:  11258227     Owner:  NLM     Status:  MEDLINE    
This article discusses studies of separated twins, with special emphasis on the Minnesota Study of Twins Reared Apart (MISTRA), to determine whether they support the existence of an important genetic component in behavioral and personality differences. The methods and conclusions of the MISTRA team are discussed in the context of earlier studies of separated identical twins. I argue that volunteer-based studies are biased toward greater twin similarity. In addition, the MISTRA research team did not publish or share raw data and case history information. Reared-together and reared-apart monozygotic twins share important environmental similarities not controlled for by comparing personality correlations. I propose an alternative control group consisting of biologically unrelated pairs of strangers matched on all environmental factors common to pairs of separated monozygotic twins. I conclude that the evidence from studies of twins reared apart does not support the role of genetic factors in personality and behavioral differences.
J Joseph
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Publication Detail:
Type:  Evaluation Studies; Journal Article; Twin Study    
Journal Detail:
Title:  The American journal of psychology     Volume:  114     ISSN:  0002-9556     ISO Abbreviation:  Am J Psychol     Publication Date:  2001  
Date Detail:
Created Date:  2001-03-21     Completed Date:  2001-07-19     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0370513     Medline TA:  Am J Psychol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1-30     Citation Subset:  IM    
California School of Professional Psychology, Alameda, USA.
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MeSH Terms
Behavior / physiology
Child Rearing*
Personality / genetics*
Twins, Monozygotic / genetics*,  psychology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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