The evolutionary explanations of sleep

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1. AO2: An alternative approach by Horne (1998) combines the evolutionary and restorative explanations. It suggests:

  • There is a core and optional sleep: the core sleep is mainly SWS and is vital for processes to work and optional sleep is mainly REM and is dispensable.
  • There is a core and optional sleep: the core sleep is mainly REM and is vital for processes to work and optional sleep is mainly SWS and is dispensable.
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2. AO2: Capellini (2008) looked at previous studies with standardised procedures and found that smaller animals with higher metabolic rates sleep less. This could be due to?

  • Foraging requirements
  • wanting to waste time
  • wanting to conserve energy
  • wanting to avoid predators

3. AO2: general support for the evolutionary approach comes from who that found mammals with similar genes have similar sleep patterns

  • Siegel (2008)
  • Meddis (1975)
  • Capellini (2008)
  • Horne (1998)

4. AO1: Sleep ensures animals stay still when they have nothing else to do. Sleeping more is the best way to pass on genes due to it being safer to be asleep.This refers to which evolutionary explanation?

  • Predator Avoidance
  • Energy Conservation
  • Waste of Time
  • Foraging Requirements

5. AO1: Predators can sleep more whilst prey have to sleep less. This refers to which evolutionary explanation?

  • Foraging Requirements
  • Energy Conservation
  • Predator Avoidance
  • Waste of time

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