Washington discusses the Herrmann Brain Dominance Instrument (HBDI), an exercise that allows people to become aware of their communication style as it relates to their thinking preferences. The HBDI model was brilliantly framed to fit and assess anyone in any business, or career. The Herrmann exercise claims that understanding personal thinking preferences will enable one to optimize the ability to adapt the way he/she perceives the world to a method of communication style that's most effective. It also explains why it is easier to communicate with some people than it's with others