The human head consists of a left brain and a right brain, each with distinct cognitive functions. The left hemisphere is known for processing logic and doing verbal and mathematical analysis while the right half excels in creativity and imagination, the visual stuff.
But the left brain holds responsibility for how we react since it's the one that interprets. As we think, so are we. As neuroscience writer Eric Barker points out, “anxiety and depression are caused by thinking problems.” In other words, we tend to exaggerate and jump to conclusions when there's none to be drawn. Exhibit A:
Right Brain: The boss seems agitated.
Left Brain: Better get the resume together. We’re getting fired.
Mindfulness acts as the parent-guardian to a brain in flux. It helps people take a step back from the false information they design in their heads. Polish-American scientist Alfred Korzybski once said that “the map is not the territory.” In other words, a map is an abstraction of land, a mere model of reality just as skeuomorphism makes an icon for trash look like a garbage can. Similarly, the medium is the message.
There is no such thing as the left-right lateralization of brain function; there's only one brain that works with the sum of its parts. Designers can be mathematicians and vice versa, as the brain may be partial to skills but impartial to sidedness. It's how we think about ourselves and our surroundings that usually gets in the way.