Emergenesis: An alternative and a confound.

Comments on the proposition of D. T. Lykken et al (see record 1993-16512-001) that there is a genetic explanation (emergenesis) for the similarity of monozygotic twins reared apart (MZA). Emergenesis is challenged and it is argued that the authors' research method is inherently confounded. An environmental explanation is suggested, which holds that MZAs' personalities are similarly molded because of their shared physical appearance. (PsycINFO Database Record (c) 2010 APA, all rights reserved)