Ambivert

Many there are, as I have already shown, whose life can not be readily described by either the definitions of extroversion or introversion. [...] It is these I have called ambiverts. With them, extroversion or introversion are but passing states of mind, whereas with the extrovert extroversion is the dominant condition and with the introvert introversion is the dominant condition.

[‘]We are not in the same class, in more ways than one’ (laughing), ‘she's a little genius, I'm a plain American ambivert, but we are enrolled in the same Advanced French group [...].’

Whenever parents are successful in this process of building a balanced personality from an introvert or an extrovert, we call the finished product an ambivert. An ambivert can move into a social situation and be a hearty, outgoing, gregarious participant. Or he can pick up a book and start the mental processes going like a regular introvert.

Ambiverts use even fewer colloquial words than the introverts, but the extraverts use clearly more of these words than the two other groups. [...] The global image that emerges is that differences are limited between ambiverts and introverts but that the extraverts stand out. They use many more colloquial words which could be the result of their lower levels of foreign language anxiety, less inhibition, and less fear of punishment.

[A] bright (high fluid intelligent), stable ambivert from a middle-class home that provides and values education may be encouraged to develop a deep approach to learning and an analytic, or Type I, intellectual style.

Selling of any sort—whether traditional sales or non-sales selling—requires a delicate balance of inspecting and responding. Ambiverts can find that balance. They know when to speak up and when to shut up. Their wider repertoires allow them to achieve harmony with a broader range of people and a more varied set of circumstances. Ambiverts are the best movers because they're the most skilled attuners.