Psychology - Biorhythms studies Theme B
- Created by: Nashaan
- Created on: 29-05-13 12:45
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- Biorhythms Theme B
- Nature of sleep
- Dement + Kleitman
- ppts awakened during REM sleep reported dreams 80-90% of the time. 7% in NREM sleep
- Kripke et al
- People sleeping 6/7hrs had reduced mortality risk. 8hrs-15% inc. 10hrs-30% inc.
- Dement + Kleitman
- Functions of sleep
- Restoration explanation
- Randy Gardner
- Stayed awake 260 hrs. No sig. psychotic problems. Normal after lengthy sleep
- Peter Tripp
- Stayed awake 201 hrs. After 3 days- abusive. 5 days- Hallucinating, paranoid. Cont. decline in body temp. Normal after 24hr sleep
- Rechtschaffen
- Forced rats to stay awake on rotating disc. 33 days- died
- Randy Gardner
- Evolutionary Explanation
- Zepelin + Rechtschaffen
- Energy conservation - Smaller animals with higher metabolic rates slept longer than larger animals.
- Allison + Cicchetti
- Predator avoidance - Species with higher risk of predation sleep less
- Larger animals less NREM sleep, not less REM. NREM more important for EC
- Capellini
- Rejects energy conservation. Accepts foraging + predator avoidance. -ive correlation with metabolic rate and sleep - only on land mammals
- Zepelin + Rechtschaffen
- Restoration explanation
- Nature of sleep
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