Sleep

1
Sleep

• Studies of sleep deprivation
• Explanations of sleep
• Restoration theory
• Ecological theory
• Implications of sleep deprivation studies for
  these theories

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2
Sleep deprivation

• Rechtschaffen Bergman (1995)
• Increased appetite, metabolism imply body working
  harder
• Immune function starts failing under prolonged
  deprivation
• Suggests sleep necessary for normal biological
  functioning

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3
Sleep deprivation

• Webb Bonnett (1979a)
• No obvious physiological effects following
  restricted sleep
• Tendency to recover missed sleep the following
  night
• Rebound suggests that sleep is a necessary
  function

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4
Sleep deprivation

• Webb Bonnet (1979b)
• No apparent physiological effects following
  gradual reduction in sleep to 4hrs
• Implies that some of our sleep is optional

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5
Sleep deprivation

• Individual case studies
• Wide variety of effects from mild to severe imply
  broad individual differences
• Effects may be from sleep deprivation or possible
  pre-existing pathology
• Difficult to generalise from single cases

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