Extroverts are more attuned to social rewards, so they are more likely to flash a smile for effect. A notable exception are introverts - like me - whom I call "socially accessible" introverts. We have been trained well to smile and nod, which can place a burden on our processing efforts.
Laurie HelgoeIntroverts tend to internalize problems. In other words, we place the source of problems within and blame ourselves. Though introverts may also externalize and see others as the problem, it's more convenient to keep the problem "in house." Internalizers tend to be reliable and responsible, but we can also be very hard on ourselves.
Laurie HelgoeWith public speaking, practicing congruence is very helpful - allowing the words to be expressed with the face and body. It helps to think of simply "turning up the nonverbal volume."
Laurie HelgoeSome findings reveal extroverts as more adept at reading nonverbal cues, and attribute this to the extrovert's greater interest and experience with social interactions. Another line of research using subliminal images of facial emotion found introverts to be more sensitive to the differences, and hypothesized that this may be why introverts regulate the amount of incoming social information.
Laurie HelgoeIntroverts like being introverts. We are drawn to ideas, we are passionate observers, and for us, solitude is rich and generative.
Laurie Helgoe