My parents have been visiting us for the past month. my Mother appears to be NA/NA- while Dad appears to be N/NP. My brothers are NA/NA- while I appear to be like my dad. my sons appear to be NP/NPA-/=. When we are all together talking, the NPA theory seems completely confirmed in my mind as one sees the quietness and placidity of those with N/NP, the loudness and talkativeness of those with A/A- trait and the deference and/or shyness of those with NP/NPA-/=.
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