Dienstag, 28. Januar 2014

Genetic and Environmental Influences on Personality: A Study of Twins Reared Together Using the Self- and Peer Report NEO-FFI Scales

Genetic and Environmental Influences on Personality: A Study of Twins Reared Together Using the Self- and Peer Report NEO-FFI Scales
Rainer Riemann, Alois Angleitner, and Jan Strelau;
Journal of Personality, September 1997 


Abstract

Previous behavior-genetic research on personality has been almost exclusively based on self-report questionnaire measures. The purpose of this research was to measure personality constructs via self- and peer reports on the items of the NEO Five-Factor Inventory (Costa & McCrae, 1989). The sample included 660 monozygotic and 200 same sex and 104 opposite sex dizygotic twin pairs. We collected self- and two independent peer reports for each of the twins. Our analysis of self-report data replicates earlier findings of a substantial genetic influence on the Big Five (h2= .42 to .56). We also found this influence for peer reports. Our results validate findings based solely on self-reports. However, estimates of genetic contributions to phenotypic variance were substantially higher when based on peer reports (h2= .51 to .81) or self- and peer reports (h2= .66 to .79) because these data allowed us to separate error variance from variance due to nonshared environmental in-fluences. Correlations between self- and peer reports reflected the same genetic influences to a much higher extent than identical environmental effects.


[Thanks @ Staffan -> "Studies that have managed to minimize measurement error typically yield heritabilities for personality traits and similar characteristics around 70 percent." ]

Kommentare:

  1. Your welcome. I tried to comment before but it must have got lost somehow. By coincidence I found something here to use in my blog too the very same day, regarding the IQ levels required for various educations.

    Also, have you considered calling this blog My Science Blog and drop the German part? I think may will assume they can't read it and move on.

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  2. Thanks Staffan. I've never thought about this before. I changed some elements and dropped the German subtitle. Nevertheless I will keep the title "Mein Naturwissenschaftsblog", because it's easier to find "Mein Naturwissenschaftsblog" than "My Science Blog". (There are quite a few >My Science Blog<s out there.)

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