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Manipulating sleep duration perception changes cognitive performance - An exploratory analysis.

Shadab A Rahman1, Dharmishta Rood2, Natalie Trent2

  • 1Division of Sleep and Circadian Disorders, Departments of Medicine and Neurology, Brigham and Women's Hospital, Boston, MA 02115, United States of America; Division of Sleep Medicine, Harvard Medical School, Boston, MA 02115, United States of America.

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Believing you slept longer improves reaction time, even with actual sleep restriction. Perceived sleep duration significantly impacts cognitive performance and physiological responses, highlighting the mind-sleep connection.

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AlertnessCognitionFalse-clock paradigmPerceived timeSleep

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Area of Science:

  • Sleep science
  • Cognitive neuroscience
  • Psychophysiology

Background:

  • Sleep duration is crucial for cognitive function and well-being.
  • Perception of sleep may influence subjective and objective outcomes.
  • Understanding the interplay between perceived and actual sleep is vital.

Purpose of the Study:

  • To investigate the impact of perceived sleep duration on cognitive performance.
  • To examine how subjective sleep duration influences psychomotor vigilance and sleepiness.
  • To assess the effects of perceived sleep on physiological markers of sleep pressure.

Main Methods:

  • Healthy adults underwent controlled sleep opportunities (8h vs. 5h).
  • Participants were misinformed about their actual sleep duration.
  • Cognitive tests, sleepiness ratings, and waking electroencephalography (EEG) were employed.

Main Results:

  • Quicker reaction times were observed when participants believed they slept 8h, despite a 5h opportunity.
  • Slower reaction times occurred when participants believed they slept 5h, despite an 8h opportunity.
  • EEG delta power indicated heightened sleep pressure with perceived, but not actual, sleep restriction.

Conclusions:

  • Perceived sleep duration significantly modulates cognitive performance and physiological responses.
  • Subjective sleep beliefs may influence psychosomatic outcomes.
  • Further research is needed to confirm these findings and their implications for sleep health.