Two recent studies concerning serotonin and psychopathy, first Serotonin transporter gene associations with psychopathic traits in youth vary as a function of socioeconomic resources (Aug. 2010) Here along with a short article by the authors of the study; Economic status, genetics together influence psychopathic traits Here Another piece of the puzzle? However, like Dr. Simon points out in his post from, July 23, 2010, and I quote, “There is also the “nature vs. nurture” argument. For a long time, behavioral scientists argued that we’d all be the same were it not for the fact that we are subjected to very different environmental influences and contingencies. But these days there is plenty of evidence that certain behavioral tendencies are strongly influenced by genetic, temperamental, and other constitutional factors.” Please see my previous post as well.
Next an interesting study by Andrea L. Glenn, In Press, Uncorrected Proof, online 30 July 2010, The other allele: Exploring the long allele of the serotonin transporter gene as a potential risk factor for psychopathy: A review of the parallels in findings. Abstract below;
“Converging evidence suggests that the short allele of the serotonin transporter gene polymorphism increases risk for a variety of psychological disorders, including depression, anxiety, and alcoholism. Thus, the short allele is typically considered the “risk” allele, and findings related to the long allele are rarely discussed. However, upon closer examination, findings associated with the long allele of the serotonin transporter gene share striking similarities with findings from studies of psychopathy. Here, the parallels between findings associated with the long/long genotype and findings associated with psychopathic traits in the areas of neuropsychology, psychophysiology, hormones, and brain imaging are reviewed. It is suggested that the long/long genotype may be a potential risk factor for the development of psychopathic traits.”