The German chemist Friedrich Kekule claimed to have intuited the chemical structure of the benzene ring after falling asleep in his chair and dreaming of an ouroboros (a serpent biting its own tail). He’s certainly not the only person to have discovered a flash insight after waking from a good sleep. In science alone, many breakthroughs were apparently borne of a decent snooze, including Mendeleyev’s creation of the Periodic Table and Loewi’s experiments on the transmission of nervous signals through chemical messengers.
Most of us have tried sleeping on a difficult problem before and using an elegant experiment, Denise Cai from the University of California in San Diego has shown that this old technique really does have merit to it. She found that our brains are better at integrating disparate pieces of information after a short bout of REM (rapid eye movement) sleep – a deep, dream-rich slumber that involves a rapid fluttering of the eyes. Cai thinks that REM sleep catalyses the creative process by allowing the brain to form connections between unrelated ideas.
Cai is by no means the first person to link sleep or dreaming to creative revelations, but she is one of the few to test it directly through experiments. She asked 77 people to complete a task, where they were given a list of three words and had to find a fourth that was linked to all three. For example, ‘cookie’, ‘heart’ and ‘sixteen’ are all associated with ‘sweet’. In each example of this ‘Remote Associates Test‘ (RAT), the missing fourth word has a different relationship to each of the three targets.