Sleep (Evolutionary theory) 0.0 / 5 ? PsychologySleepA2/A-levelAQA Created by: SophieCreated on: 28-05-15 10:49 What does Meddis believe is the function of sleep? Protection from harm 1 of 10 What is one issue with this theory? only applies to animals that have a nest/burrow/safe place to sleep 2 of 10 What did Alison + Chicchetti find? Species most at risk (grazing animals) got very little sleep, while those least at risk (big cats) slept for most of the day 3 of 10 What did Meddis add to his original theory? Suggested that an animals metabolic rate affects the amount of sleep they get. 4 of 10 How does the shrew provide support for this theory? The shrew has a very high metabolic rate, therefore it has to spend a lot of time eating so it has less time to sleep. 5 of 10 Which animal risks its life to get sleep and what does this suggest? The bottlenose dolphin. Suggests sleep has an essential physiological function. 6 of 10 Which sleep deprivation studies support this? Jouvet's cat and Rechtschaffen's rats - in both cases animals died when they were deprived of sleep. 7 of 10 What does Webb believe is the function of sleep? To conserve energy at a time when we could not normally be active because of darkness (hibernation theory) 8 of 10 What evidence is there to support this? Metabolism does slow during sleep and calories are saved (but not many) 9 of 10 What is the main issue with the way that research in this area is carried out? Carried out on animals - can't generalise to humans. Carried out on tiny samples of animals - doesn't account for variation within species 10 of 10
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