Dr. Adam Bisaga, an addiction psychiatrist at the New York State Psychiatric Institute, agreed that the findings could help lead to improved addiction treatment.
"The importance of this research is that, hopefully, in the future, we'll be able to treat patients better, because we can do some genotyping and target treatment better depending on a patient's genetic make-up," Bisaga said. "Probably, dopamine receptor variability is not going to explain all the differences in behavior. It's a little more complicated than that. But this work now gives us at least some biological basis for understanding temperament and other personality characteristics."