The Weizman Institute of Science recently published an article that people are actually able to learn while they are asleep. Unfortunately, the information learned was much simpler than what most people would hope for. Using classical conditioning, also known as Pavlovian conditioning, the Weizmann researchers played certain sounds while wafting different odors to the volunteers while they were asleep. The researchers used pleasant smells, such as deodorant and shampoo, and unpleasant smells, such as rotting fish and carrion. The scientists found that the sleepers breathed shallowly when exposed to the unpleasant smells, but sniffed in deep when exposed to the pleasant smells.

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