NPA personality theory
[ Post a Response | NPA personality theory ]
Posted by Donna Hobgood on March 9, 2018, 10:02 am, in reply to "Re: Temperament
The mode of inheritance was the reason that the NPA traits were considered genetic. Originally A- trait was thought environmental but was assessed later to be genetic. Also one of the differences with NPA theory and other genetic theories (several are out there such as Cloninger, etc. Five Factor, Etc) is that NPA theory posits the traits as being coded for by one gene each or one set of closely related genes (example, "genes controlling dopamine availability in a certain part of the brain") while other genetic theories posit that each trait is a continuous variable with many many genes impacting each trait each causing say 1-5% of the trait's expression.
So I thought going back to that premise can help figure out the causes of the NPA traits. So the NPA traits may tend to have one gene or set of genes causing each of the three? While A- trait may have different genes in different families. Would we posit that all the genes causing A- trait would be loosely closely related. For example, a gene causing height and another gene causing production of thyroid hormone wouldn't both be in the list of causes of A- trait or would they??