The herrmann brain dominance instrument

The Herrmann Brain Dominance Instrument is an assessment that reveals a person's preference for one or more thinking styles that naturally occur in the way humans process information. With awareness of your thinking style, it becomes easier to identify and adapt to the similarities and differences in the way others think, communicate, solve problems, and make decisions. We work with executives and their leadership teams to strengthen and enhance their use of Whole-Brain® thinking, which helps leaders and teams benefit from all of the different thinking styles available to them.  

You take a genuine interest in what makes each individual “tick,” which gives you a very real perspective to provide coaching in a way that can be understood and internalized.
— Vistage member