It divides people into extroverts and introverts, and then segments them even more into types that sense vs. intuit, think vs. feel and judge vs. perceive.

FORBES: How Your Personality Type Affects Your Finances

In a three-month period, they made 24% more in sales revenue than introverts, and 32% more in revenue than extroverts.

FORBES: Move Over Extroverts, Here Come the Ambiverts

Extroverts think out loud and can do verbal dances while introverts prefer to contemplate issues and respond more thoughtfully.

FORBES: Silly Interview Questions