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But first, to appreciate why the RED–BLUE mind model makes sense in performance situations, it will help if we understand some basic facts about how the brain is structured.

We can view the structure of the brain in terms of three parts, or levels.

brainstem

limbic systembasal ganglia

cerebral cortexleftright hemispheres,

THE HUMAN BRAIN

External structure

From the outside, the brain is dominated by two large cerebral hemispheres.

Although nearly all mental tasks are based on a combination of left- and right-hemisphere activity, one will dominate, because they function very differently in terms of the types of information they process.

Right-hemisphere processes are automatic, fast, and largely unconscious. The right hemisphere works in the here and now, using non-verbal information such as images, and has the capacity to see the big picture, taking an instant snapshot of the situation.

Left-hemisphere processes are deliberate, slower, and conscious. The left hemisphere works by matching current reality with past experiences, using language and calculation to construct stories, explanations and timelines.