The HBDI Whole Brain Thinking is a psychometric assessment or HBDI test, that shows how you prefer to think. We don’t much like the words HBDI test because that denotes better or worse, preferring assessment. It is often referred to as the ‘Whole Brain Model’ or the HBDI Herrmann Brain Dominance Instrument, it shows us which areas we prefer to think, and which areas we prefer not to think.