Current trends in online social interaction have led to an increase in personalization and a decrease in anonymity owing to both technological advances and changing social norms (for a review, see Bargh & McKenna, 2004; McKenna & Bargh, 2000). At the forefront of these changing trends are blogs (short for weblogs), which are personal websites updated regularly by their creator where journal-lik...

Individuals differ in innumerable ways, some adaptive, some maladaptive, and some neutral. Personality theories, we argue, can profit from distinguishing among these importantly different types of individual variation. This article outlines a taxonomy of origins of individual differences—environmental sources of adaptive differences (e.g., early environmental calibration), heritable sources of ...

An English translation of the Differentiation and Self-regulation extension scales has been used in conjunction with a reduced form of the Short Interpersonal Reactions Inventory (SIRI) in a sample of 2844 Australian twins aged over 50. Significant correlation was found between Type 1 (cancer-prone) and Type 2 (coronary heart disease prone), and between Self-regulation and Type 4 (healthy). The...

We study the personalities of emergent leaders in two coordination games in groups of four players each with monetary incentives. Our results support the evolutionary hypothesis that leadership is a social good for the group: leadership benefits followers but is potentially costly for the individual taking on the leader role. Across the two economic games leaders do less well – earn less money ...