english: I study the biology of personality, and I've come to believe that we've evolved four very broad styles of thinking and behaving, linked with the dopamine, serotonin, testosterone and estrogen systems.
non_english: Izučavam biologiju ličnosti i stigla sam do uverenja da su kod nas evoluirala četiri veoma široka načina razmišljanja i ponašanja, u vezi sa sistemima dopamina, serotonina, testosterona i estrogena.