Barnes Et Al
DEMONSTRATING THE VALIDITY OF TWIN RESEARCH IN CRIMINOLOGY∗ J. C. BARNES,1 JOHN PAUL WRIGHT,1,6 BRIAN B. BOUTWELL,2 JOSEPH A. SCHWARTZ,3 ERIC J. CONNOLLY,4 JOSEPH L. NEDELEC,1 and KEVIN M. BEAVER5,6 1School of Criminal Justice, University of Cincinnati 2School of Social Work, Saint Louis University 3School of Criminology and Criminal Justice, University of Nebraska at Omaha 4Criminal Justice Department, Pennsylvania State University, Abington 5College of Criminology and Criminal Justice, Florida State University 6Center for Social and Humanities Research, King Abdulaziz University, Jeddah, Saudi Arabia KEYWORDS: assumptions, behavior genetics, biosocial, empirical, quantitative, twins In a recent article published in Criminology, Burt and Simons (2014) claimed that the statistical violations of the classical twin design render heritability studies useless. Claiming quantitative genetics is “fatally flawed” and describing the results generated from these models as “preposterous,” Burt and Simons took the unprecedented step to call for abandoning heritability studies and their constituent findings. We show that their call for an “end to heritability studies” was premature, misleading, and entirely without merit. Specifically, we trace the history of behavioral genetics and show that 1) the Burt and Simons critique dates back 40 years and has been subject to a broad array of empirical investigations, 2) the violation of assumptions in twin models does not in- validate their results, and 3) Burt and Simons created a distorted and highly misleading portrait of behavioral genetics and those who use quantitative genetic approaches. “The flaws of twin studies are not fatal, but rather seem no worse (and may be better) than the flaws of the typical causal study that relies on observational data.” (Felson, 2012: ii) Behavioral genetic research has existed for more than 100 years (Maxson, 2007).
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