Computations in extraversion

Studies of human performance indicate that extraverts show enhanced motivat ion in relation to reward signals, but not in relation to safety signals un der defensive conditions. When it occurs under defensive conditions, enhanc ed motivation may be related to neuroticism. While extraverts show some att entional skills consistent with frontal dopaminergic facilitation, other fr ontal capacities may be related to conscientiousness. These findings sugges t that dopaminergic influences on response and attentional processes may co ntribute to additional personality dimensions such as neuroticism and consc ientiousness.