Two experiments examined whether aspects of extraversion concerned with agency (leadership, dominance) and affiliation (friendliness, positive emotion) reflect susceptibility to positive affect (PA). In experiment 1, both aspects of extraversion predi...

One of the most robust observations in personality and emotion research is the finding that extraverts are happier than introverts. Some theorists have attributed this to differential reactivity of the brain reward system, which is central to many bio...

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