Myth: It is possible to plan learning in sleep

Myth

It is possible to plan learning in sleep. An untold number of learning programs promise you to save years of life by learning during sleep.

Fact

It is possible to store selected memories generated during sleep by: external stimuli, dreams, hypnagogic and hypnopompic hallucinations (i.e. hallucinations experienced while falling asleep and while waking up). However, it is nearly impossible to harness this process into productive learning. The volume of knowledge that can be gained during sleep is negligible. Learning in sleep may be disruptive to sleep itself. Learning while sleeping should not be confused with the natural process of memory consolidation and optimization that occurs during sleep. This process occurs during a complete sensory cut-off, i.e. there are no known methods of influencing its course to the benefit of learning. Learning while sleeping is not only a complete waste of time. It may simply be bad for the quality of sleep, memory, and health

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