An article on "Brain Mapping" that I read recently had some interesting insights on the working of our brain. A study at 3M Corporation concluded that we process visuals 60,000 times faster than text. Words are processed by our short-term memory, which retains only about 7 bits of information. On the other hand, images remain indelibly in our long-term memory. This probably explains the use of symbols worldwide to convey information related to a variety of subjects, like, vegetarian/non-vegetarian food, recyclable/one-time use plastics, parking/no parking areas, entry/exit symbols, emergency exits, fire alarms, hospitals etc.
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