Here is cloninger explaining temperament. They divide it into novelty seeiking, reward dependance, persistence and harm avoidance.
So this is a system that is genetic ( 40%)and describes personality in a dimension of “ volume control” modulating the NPA traits. Cloninger cites a verge large number of genes as being involved in temperament. One that should be considered is the ABO gene where high temperament ( novelty seeking as an example) is prevalent in ABO O.
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