Fisher's four chemical type personality chart, according to which she divides people into four groups: adventurer's (dopamine people), negotiator (estrogen people), builder (serotonin people), and director (testosterone people), whom she matches based on those types. |
“When you massage someone, the levels of oxytocin go up in the brain, and oxytocin is one of the chemicals that drives attachment.”— Helen Fisher (c.2005) (Ѻ)
“Plato came up with these four types, and then Aristotle, and Galen in the second century A.D., and then Carl Jung. We've known about these types for hundreds of years. What I've done is add that biological [chemical] component.”— Helen Fisher (c.2007), commentary on her four-types theory