Siffre 1962

• In cave for 2 months
• Maintained a regular sleep-wake cycle of about 25 hours
• Weakness Siffre

  • had artificial light
  • wrongly believed artificial light wouldn't affect it
• DeCoursey et al (2000)

  • removed chipmunks SCN
  • died because they were easily identified by predators
• Strength Siffre: application

  • chronotherapy
  • coordinates drug delivery with circadian rhythms
  • the study of how timing affects drug treatments and other interventions
  • cancer is a chronotherapeutic disorder, chronotherapy plays a vital role in the quality of life and survival rates for oncology patients
  • shows importance of understanding psychological rhythms