Slow-wave sleep after learning a new task can improve resultant performance on that task and appears essential for effective memory formation. Because of this impact on cognitive function, cramming all night for a test may be ineffective and counterproductive.

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Sleep is important for cognitive function and memory formation.

Sleep and Cognitive Function

Spielman, R. M., Jenkins, W. J., & Lovett, M. D. (2020, April 22). Psychology (2nd ed.). OpenStax. https://openstax.org/books/psychology-2e/pages/1-introduction

OpenStax Psychology (2nd ed.) Textbook

Sleep deprivation results in disruptions in cognition and memory deficits. These impairments include a reduced ability to maintain attention, make decisions, and recall long-term memories. The severity of these impairments increases as the amount of sleep deprivation increases.

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