Useful information on right/left-brain thinking

Betty Edwards has used the terms L-Mode and R-Mode to
designate two ways of knowing and seeing – the verbal,
analytic mode and the visual, perceptual mode – no matter
where they are located in the individual brain. You are
probably aware of these different characteristics. L-mode
is a step-by-step style of thinking, using words, numbers
and other symbols. L-mode strings things out in sequences,
like words in a sentence. R-mode on the other hand, uses
visual information and processes, not step-by-step, but all
at once, like recognizing the face of a friend.

“You have two brains: a left and a right. Modern brain
scientists now know that your left brain is your verbal and
rational brain; it thinks serially and reduces its thoughts
to numbers, letters and words… Your right brain is your
nonverbal and intuitive brain; it thinks in patterns, or
pictures, composed of ‘whole things,’ and does not
comprehend reductions, either numbers, letters, or words.”

From The Fabric of Mind, by the eminent scientist and
neurosurgeon, Richard Bergland. Viking Penguin, Inc., New
York 1985. pg.1